Journal articles: 'Chilka Lake'

1

SUDHAKAR, S., and D. K. PAL. "Water quality assessment of the Lake Chilka." International Journal of Remote Sensing 14, no. 14 (1993): 2575–79. http://dx.doi.org/10.1080/01431169308904294.

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De Grave, Sammy, Manal Al-Kandari, and Arthur Anker. "A new species of Ogyrides (Decapoda, Caridea, Ogyrididae) from Kuwait." Crustaceana 93, no. 2 (2020): 225–35. http://dx.doi.org/10.1163/15685403-bja10007.

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Abstract A new species of telescope shrimp, Ogyrides sindibadi sp. nov. is described from Kuwait. The new species is morphologically similar to O. striaticauda Kemp, 1915, originally described from Chilka Lake (India), but can be distinguished by the shape of the scaphocerite, the much longer dactylus of the third pereiopod, as well as the shape of the distal margin of the telson.

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Rao, D. P., S. K. Subramanian, and R. Sudarshana. "Geomorphic analysis of Chilka lake and adjoining area using remotely sensed data." Journal of the Indian Society of Remote Sensing 14, no. 2 (1986): 53–61. http://dx.doi.org/10.1007/bf03007231.

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ADHIKARY, Siba Prasad, and Jayanti Kumari SAHU. "Distribution and Seasonal Abundance of Algal Forms in Chilka Lake, East Coast of India." Japanese Journal of Limnology (Rikusuigaku Zasshi) 53, no. 3 (1992): 197–205. http://dx.doi.org/10.3739/rikusui.53.197.

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Shameem, U., N. Narasimha Rao, and R. Madhavi. "Cercaria chilkaensisNo. 1, a new cystophorous cercaria from the snailStenothyra blanfordianafrom Chilka lake, India." Journal of Natural History 24, no. 1 (1990): 261–70. http://dx.doi.org/10.1080/00222939000770171.

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6

Bhattacharya, S., S. K. Sen, and A. Acharyya. "Structural evidence supporting a remnant origin of patchy charnockites in the Chilka Lake area, India." Geological Magazine 130, no. 3 (1993): 363–68. http://dx.doi.org/10.1017/s0016756800020045.

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AbstractDark patches of charnockitic rocks characterized by orthopyroxene occur within garnetiferous granite gneisses (leptynites) in a granulite-migmatite suite around the Chilka Lake, Orissa, within the Eastern Ghats belt in the Indian Precambrian. Analysis of structures of different scales observed in this terrain establishes the presence of three phases of deformation. S1 is pervasive in the metapelitic granulites (mainlykhondalite), while in the migmatite complex composed of leptynites, charnockites and quartzofeldspathic veins, S1 is present exclusively within the charnockite lenses and bands, and shows different stages of obliteration in the associated leptynites. Thus, the charnockite patches must be earlier than the surrounding migmatitic rocks. The charnockite patches and the surrounding leptynitic gneisses are chemically quite different and the two rock types are not related by any prograde or retrograde transformation. The shapes and disposition of charnockite patches in the mixed exposures are found to be largely controlled by the third phase of folding and locally associated shearing. The kinematics of this late deformation are not favourable for fluid ingress from deeper levels.

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Bhattacharya, S., A. K. Chaudhary, A. K. Saw, P. Das, and D. Chatterjee. "Mafic granulite xenoliths in the Chilka Lake suite, Eastern Ghats Belt, India: evidence of deep-subduction of residual oceanic crust." Solid Earth Discussions 4, no. 2 (2012): 1379–410. http://dx.doi.org/10.5194/sed-4-1379-2012.

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Abstract. Granulite xenoliths preserve key geochemical and isotopic signatures of their mantle source regions. Mafic granulite and pyroxinite xenoliths within massif-type charnockitic rocks from the Eastern Ghats Belt have recently been reported by us. The mafic granulite xenoliths from the Chilka Lake granulite suite with abundant prograde biotite are geochemically akin to Oceanic Island Basalt (OIB). They can be distinguished from the hornblende-mafic granulite xenoliths with signatures of Arc-derived basalt occurring in the other suites of the Eastern Ghats Belt. These two groups of xenoliths in the Paleoproterozoic Eastern Ghats Province have quite distinct Nd-model ages- 1.9 Ga and 2.5 Ga respectively, which may be interpreted as their crustal residence ages. Strong positive Nb anomalies, indicating subducted oceanic crust in the source, LREE enrichment and strongly fractionated REE pattern are key geochemical signatures attesting to their origin as OIB-type magma. Also low Yb and Sc contents and high (La / Yb)N ratios can be attributed to melting in the presence of residual garnet and hence at great depths (> 80 km). The variable enrichment in radiogenic 87Sr, between 0.70052 and 0.71092 at 1.9 Ga and less radiogenic 143Nd between ε-1.54 and 7.46 are similar to those of the OIBs compared to MORBs. As OIBs commonly contain some recycled oceanic crust in their sources, we suggest that the residue of the oceanic crust from a previous melting event (~ 2.5 Ga) that produced the Arc-derived basalts (protoliths of hornblende-mafic granulite xenoliths) could have subducted to great depths and mechanically mixed with the mantle peridotite. A subsequent re-melting event of this mixed source might have occurred at ca. 1.9 Ga as testified by the crustal residence ages of the biotite-mafic granulite xenoliths of the Chilka Lake granulite suite.

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Menon, A. G. K., and K. Raman. "ECOLOGY OF SOME MARINE LAGOONS ALONG THE EAST-COAST OF INDIA WITH SPECIAL REFERENCE TO THE MANAGEMENT AND UTILISATION OF THEIR RESOURCES." Marine Research in Indonesia 20 (May 10, 2018): 131–38. http://dx.doi.org/10.14203/mri.v20i0.387.

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The marine lagoons along the east coast of India such as the Chilka-lake in Orissa State, the Pulicat and the Ennore lakes near Madras, Silvatturai lagoon in Tuticorin, and the Mandapam lagoon in Ramanathapuram are shallow, vast sheets of saline water whose physical and chemical characteristics are quite different from the backwaters of the west coast and constitute distinct categories of biological environment. The main characteristic feature of these lagoons is that they are connected to the sea by a narrow mouth which is closed by a sand bar for varying periods of the year. One or more seasonal rivers open into some of these lagoons and flood them during the monsoon. The land run-off during monsoon is the only source of freshwater for others. The bar-mouth connection with the sea is opened by the thrust of the flood waters aided in some cases by human effort. This opening operates for a few months between November — December and June - July or throughout during some years following heavy monsoon. The closure occurs by general silting and formation of a sand bar.

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9

Naik, Subrat. "Spatio-temporal distribution of zooplankton in Chilka lake- A Ramsar site on the Indian east coast." Indian Journal of Science and Technology 1, no. 3 (2008): 1–5. http://dx.doi.org/10.17485/ijst/2008/v1i3/9.

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10

Panda, D., V. Subramanian, and R. C. Panigrahy. "Geochemical fractionation of heavy metals in Chilka Lake (east coast of India)?a tropical coastal lagoon." Environmental Geology 26, no. 4 (1995): 199–210. http://dx.doi.org/10.1007/bf00770470.

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11

Prakash, D., B. Vishal, A. S. Naik, et al. "New Occurrence of Sapphirine-spinel-bearing Granulite from NW of Chilka Lake, Eastern Ghats Belt, Odisha." Journal of the Geological Society of India 93, no. 2 (2019): 153–56. http://dx.doi.org/10.1007/s12594-019-1143-7.

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12

DOBMEIER, CHRISTOPH, and MICHAEL M. RAITH. "On the origin of ‘arrested’ charnockitization in the Chilka Lake area, Eastern Ghats Belt, India: a reappraisal." Geological Magazine 137, no. 1 (2000): 27–37. http://dx.doi.org/10.1017/s0016756800003472.

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Arrested-type charnockite formation occurs in an assemblage of high-grade gneisses at several localities of the Chilka Lake area that belongs to the Proterozoic Eastern Ghats Belt of India. The isolated ellipsoidal domains are found exclusively in leucogranite (leptynite) bands that intruded lit-par- lit interbanded granulite-grade supracrustal and intermediate igneous rocks (khondalite–enderbite). Macrostructures and microfabrics document a multiple deformation of the rock assemblage under high-grade conditions. The intrusion of the leucogranitic melts separates a first episode of deformation, D1, from a younger progressive deformation, D2–D4. A transpressive regime and inhomogeneous deformation is indicated for D2–D4 by the associated structures and fabrics. But quartz c-axis patterns show that pure shear prevailed during the closing stages of deformation. The spatial distribution and orientation of the ellipsoidal charnockite domains within the host leptynite and the orientation pattern of orthopyroxene c-axes inside the domains provide evidence for a synkinematic in situ formation of the domains during D3, through partial breakdown of the leptynite assemblage (Bt+Grt+Qtz+Fl1[rlhar ]Opx+Fsp+Ilm+Fl2/L). Local fluid migration along steep foliation planes associated with large-scale D3 folds triggered the reaction. Orthopyroxene blastesis was confined to the centre of the domains, and an envelope formed in which the residing fluid caused secondary intergranular formation of chlorite, ore and carbonate, imparting the domains' typical greenish-brown charnockite colour. The shape of the envelope, which varies from prolate in limbs to oblate in hinges of D3 folds, is responsive to the local stress field. Comparison of chemical rock compositions supports the in situ formation of charnockite in leptynite. Subtle compositional differences are controlled by the changing mineralogy. Compared to the host leptynite, the charnockite domains are enriched in K2O, Ba, Rb and Sr, but depleted in FeO*, MnO, Y and Zr. The data obtained in this study provide conclusive evidence that the ellipsoidal charnockite domains do not represent remnants of stretched enderbite layers as proposed by Bhattacharya, Sen & Acharyya, but formed in situ in the leptynite as a result of localized synkinematic fluid migration late in the deformation history.

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13

Chatterjee, Nilanjan, James L. Crowley, Amalbikash Mukherjee, and Subhasish Das. "Geochronology of the 983‐Ma Chilka Lake Anorthosite, Eastern Ghats Belt, India: Implications for Pre‐Gondwana Tectonics." Journal of Geology 116, no. 2 (2008): 105–18. http://dx.doi.org/10.1086/528901.

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14

Raith, Michael M., Christoph Dobmeier, and Hassina Mouri. "Origin and evolution of FeAl-granulite in the thermal aureole of the Chilka Lake anorthosite, Eastern Ghats Province, India." Proceedings of the Geologists' Association 118, no. 1 (2007): 87–100. http://dx.doi.org/10.1016/s0016-7878(07)80050-2.

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15

Dobmeier, Christoph, and Ralf Simmat. "Post-Grenvillean transpression in the Chilka Lake area, Eastern Ghats Belt—implications for the geological evolution of peninsular India." Precambrian Research 113, no. 3-4 (2002): 243–68. http://dx.doi.org/10.1016/s0301-9268(01)00212-1.

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16

Bhattacharya, S., S. K. Sen, and A. Acharyya. "The structural setting of the Chilka Lake granulite-migmatite-anorthosite suite with emphasis on the time relation of charnockites." Precambrian Research 66, no. 1-4 (1994): 393–409. http://dx.doi.org/10.1016/0301-9268(94)90060-4.

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17

Bhattacharya, S., M. P. Deomurari, and W. Teixeira. "Grenvillian thermal event and remnant charnockite: Isotopic evidence from the Chilka Lake granulite-migmatite suite in the Eastern Ghats belt, India." Journal of Earth System Science 111, no. 4 (2002): 391–99. http://dx.doi.org/10.1007/bf02702052.

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18

Gupta, G. V. M., V. V. S. S. Sarma, R. S. Robin, et al. "Influence of net ecosystem metabolism in transferring riverine organic carbon to atmospheric CO2 in a tropical coastal lagoon (Chilka Lake, India)." Biogeochemistry 87, no. 3 (2008): 265–85. http://dx.doi.org/10.1007/s10533-008-9183-x.

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19

SEN, S. K., S. BHATTACHARYA, and A. ACHARYYA. "A multi-stage pressure?temperature record in the Chilka Lake granulites: the epitome of the metamorphic evolution of Eastern Ghats, India?" Journal of Metamorphic Geology 13, no. 2 (1995): 287–98. http://dx.doi.org/10.1111/j.1525-1314.1995.tb00219.x.

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20

DAS, KAUSHIK, SANKAR BOSE, SUBRATA KARMAKAR, and SUPRIYA CHAKRABORTY. "Petrotectonic framework of granulites from northern part of Chilka Lake area, Eastern Ghats Belt, India: Compressional vis-à-vis transpressional tectonics." Journal of Earth System Science 121, no. 1 (2012): 1–17. http://dx.doi.org/10.1007/s12040-011-0135-9.

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21

Prasad, Akshinthala K. S. K., James A. Nienow, and Eric Lochner. "Thalassiosira mala (Bacillariophyta), a potentially harmful, marine diatom from Chilka Lake and other coastal localities of Odisha, India: Nomenclature, frustule morphology and global biogeography." Journal of Biosciences 43, no. 1 (2018): 59–74. http://dx.doi.org/10.1007/s12038-018-9730-0.

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22

SENGUPTA, P., S. DASGUPTA, N. DUTTA, and M. RAITH. "Petrology across a calcareous rock–anorthosite interface from the Chilka Lake Complex, Orissa: Implications for Neo-Proterozoic crustal evolution of the northern Eastern Ghats Belt." Precambrian Research 162, no. 1-2 (2008): 40–58. http://dx.doi.org/10.1016/j.precamres.2007.07.017.

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23

Bose, Sankar, Kaushik Das, Junji Torimoto, and Daniel Dunkley. "Origin of orthopyroxene-bearing felsic gneiss from the perspective of ultrahigh-temperature metamorphism: an example from the Chilka Lake migmatite complex, Eastern Ghats Belt, India." Mineralogical Magazine 84, no. 5 (2020): 712–37. http://dx.doi.org/10.1180/mgm.2020.71.

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AbstractOrthopyroxene-bearing felsic gneiss occurs as foliation-parallel layers and bands together with aluminous granulite, mafic granulite, and quartzofeldspathic granulite in the Chilka Lake migmatite complex of the Proterozoic Eastern Ghats Belt, India. The rock was classified previously as charnockite which underwent granulite-facies metamorphism. Field and textural features of this rock show evidence of the partial melting of a biotite-bearing greywacke protolith. Orthopyroxene with/without garnet and cordierite were produced with K-feldspar as peritectic phases of incongruent melting of presumed metaluminous sediments. Fluid-inclusion data suggest the presence of high-density CO2-rich fluids during peak metamorphism, which are similar to those found in associated aluminous granulite. Whole-rock major and trace element data show wide variability of the source materials whereas REE distributions show enriched LREE and flat HREE patterns. Zircon grains from representative samples show the presence of inherited cores having spot dates (SHRIMP) in the range c. 1790–3270 Ma. The overgrowth on zircon was formed predominantly during c. 780–730 Ma and sporadically during c. 550–520 Ma. Some neoblastic zircons with c. 780–730 Ma ages are also present. U-rich dark zones surrounding cores appear partially metamictised, but spot ages from this zone vary within c. 1000–900 Ma. The <1000 Ma ages represent metamorphism that mirrors the events in associated aluminous granulite. The sources of metaluminous sediments are speculative as the rock compositions are largely modified under granulite-facies metamorphism and partial melting. Considering the accretionary tectonic setting of the Eastern Ghats Belt during the c. 1000–900 Ma time frame, a greywacke-type protolith for the migmatite complex has been proposed.

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24

Bennett, Shannon N., Martin L. Adamson, and Leo Margolis. "Long-term changes in parasites of sockeye salmon (Oncorhynchus nerka) smolts." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 4 (1998): 977–86. http://dx.doi.org/10.1139/f97-295.

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Parasites were examined in 41 annual samples of sockeye salmon (Oncorhynchus nerka) juveniles originating from lakes in British Columbia: Chilko and Shuswap. Nine species of parasitic helminths and two species of parasitic Crustacea were recovered from various organs. The number of species ranged from three to nine per year. Most (94%) parasites belonged to three tapeworm species, identified as core to the parasite community because they also infected the most hosts. Two of these cestode species are probably maintained by resident freshwater hosts in the lakes. Positive numerical associations were observed between four parasite species pairs. Parasite communities in both lakes were composed of similar species, with the exception of three rare Chilko Lake species that were never recovered from Shuswap Lake. Parasites were often as variable within stock (temporally) as between stocks (geographically), except for the prevalence of Eubothrium sp. and Neoechinorhynchus sp. and mean annual intensity of Proteocephalus sp. and encysted digenetic metacercariae, which were greater at Chilko Lake than at Shuswap Lake. Discrimination between the two lakes based on their parasite community is possible only in extreme cases of infection and thus is of limited use to fisheries officers attempting to distinguish between these stocks.

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25

Parker, Karl E. "Common loon reproduction and chick feeding on acidified lakes in the Adirondack Park, New York." Canadian Journal of Zoology 66, no. 4 (1988): 804–10. http://dx.doi.org/10.1139/z88-119.

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The effects of lake acidification on common loon reproduction were studied on a total of 24 Adirondack lakes from May through August in 1983 and 1984. The lakes ranged in size from 10.5 to 179 ha; pH ranged from 4.65 to 6.77 and alkalinity from −66 to 111 μequiv./L. Although loons nesting on small, low-pH lakes had a high fledging rate, possibly because of reduced disturbance or predation, no significant relationship (P > 0.10) was found between lake acidity status and loon reproductive success. No chick mortality could be attributed to lake acidification, but chicks on low-pH lakes were generally fed prey much smaller or much larger than those normally preferred. A pair nesting on a fishless lake fed aquatic insects to their constantly begging chick, spending two to four times longer feeding the chick compared with loons on lakes with fish. This pair, alternating absences, flew to another lake to feed, and on three occasions returned to the nesting lake carrying a fish. Loons on the low-pH study lakes apparently adapted, at least in the short term, to food resource depletion associated with acidification. Despite this, acidification creates potentially severe feeding problems for chicks by reducing prey diversity and quantity.

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26

Bose, S., K. Das, J. Torimoto, M. Arima, and D. J. Dunkley. "Evolution of the Chilka Lake granulite complex, northern Eastern Ghats Belt, India: First evidence of ~ 780 Ma decompression of the deep crust and its implication on the India–Antarctica correlation." Lithos 263 (October 2016): 161–89. http://dx.doi.org/10.1016/j.lithos.2016.01.017.

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27

Alvo, Robert. "Common Loon, Gavia immer, Breeding Success in Relation to Lake pH and Lake Size Over 25 Years." Canadian Field-Naturalist 123, no. 2 (2009): 146. http://dx.doi.org/10.22621/cfn.v123i2.693.

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I monitored Common Loon (Gavia immer) breeding success in relation to lake pH (range 4.0–8.5) between 1982 and 2007 on 38 single-pair lakes (5–88 ha) in the Sudbury, Ontario, area. No chicks fledged on lakes with pH < 4.4. Chicks fledged on lakes with slightly higher pH only if the lakes were relatively large. Acidic lakes became less acidic as sulphur dioxide emissions from the Sudbury smelters and sulphur deposition from other long-range sources decreased. Two lakes initially too acidic to support successful loon reproduction eventually had successful reproduction. One loon pair used two large acidic lakes (combined area 140 ha) connected by shallow rapids, and one of the adults made extremely long dives (average = 99 s) while foraging for the chicks. One chick died on that lake after apparently ingesting a very large food item; the lack of smaller items was attributed to the lake’s acidity. My results suggest that a shortage of food for chicks is the main reason why low pH reduces breeding success. I suggest that, for lakes without high levels of dissolved organic carbon (DOC), the critical pH for loon breeding success is approximately 4.3, and the suboptimal pH is approximately 4.4–6.0.

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Uher-Koch, Brian D., Kenneth G. Wright, Hannah R. Uher-Koch, and Joel A. Schmutz. "Effects of Fish Populations on Pacific Loon (Gavia pacifica) and Yellow-billed Loon (G. adamsii) Lake Occupancy and Chick Production in Northern Alaska." ARCTIC 73, no. 4 (2020): 450–60. http://dx.doi.org/10.14430/arctic71533.

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 Predator populations are vulnerable to changes in prey distribution or availability. With warming temperatures, lake ecosystems in the Arctic are predicted to change in terms of hydrologic flow, water levels, and connectivity with other lakes. We surveyed lakes in northern Alaska to understand how shifts in the distribution or availability of fish may affect the occupancy and breeding success of Pacific (Gavia pacifica) and Yellow-billed Loons (G. adamsii). We then modeled the influence of the presence and abundance of five fish species and the physical characteristics of lakes (e.g., hydrologic connectivity) on loon lake occupancy and chick production. The presence of Alaska blackfish (Dallia pectoralis) had a positive influence on Pacific Loon occupancy and chick production, which suggests that small-bodied fish species provide important prey for loon chicks. No characteristics of fish species abundance affected Yellow-billed Loon lake occupancy. Instead, Yellow-billed Loon occupancy was influenced by the physical characteristics of lakes that contribute to persistent fish populations, such as the size of the lake and the proportion of the lake that remained unfrozen over winter. Neither of these variables, however, influenced chick production. The probability of an unoccupied territory becoming occupied in a subsequent year by Yellow-billed Loons was low, and no loon chicks were successfully raised in territories that were previously unoccupied. In contrast, unoccupied territories had a much higher probability of becoming occupied by Pacific Loons, which suggests that Yellow-billed Loons have strict habitat requirements and suitable breeding lakes may be limited. Territories that were occupied had high probabilities of remaining occupied for both loon species.

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BRUCE, A. J. "Additions to the genus Phycomenes Bruce, 2008 (Crustacea: Decapoda: Pontoniinae)." Zootaxa 2372, no. 1 (2010): 367–68. http://dx.doi.org/10.11646/zootaxa.2372.1.28.

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The genus Phycomenes was recently described by Bruce (2008)) for a small sea-grass inhabiting shrimp, Phycomenes zostericola Bruce, 2008, from south-east Queensland, Australia. The close similarity of this species to Periclimenes indicus (Kemp 1915) was noted. Subsequently specimens of Kemp’s species from the type locality, Chilka Lake, Orissa, India, were examined and the most characteristic features of the genus Phycomenes were found to be present, i.e., a transverse triangular median process on the fourth thoracic sternite and the greatly reduced size of the second pereiopods in comparison with other Periclimenes species, with a very well developed ocular ocellus. Periclimenes indicus is therefore transferred to the genus Phycomenes Bruce. Periclimenes cobourgi Bruce & Coombes, 1995 has also been noted as closely similar to Periclimenes indicus, showing the same major features and should also be considered as congeneric with Phycomenes zostericola. Similarly, examination of specimens of Periclimenes sulcatus Ďuriš, Horká, & Marin, 2008, and P. siankaanensis Martínez-Mayén, & Román-Contreras, 2006, kindly donated by Dr Zdenek Ďuriš and Dr Mario Martinez-Mayén to the Queensland Museum, Brisbane, show the same features and should be similarly placed in the genus Phycomenes. Martínez-Mayén and Román-Contreras (2006) considered P. siankaanensis to be a member of the “iridescens” species complex, including also P. iridescens Lebour, 1949, P. platalea Holthuis, 1951, P. antipathophilus Holthuis & Eibl-Eibesfeldt, 1964, P. patae Heard & Spotte, 1991, and P. mclellandi Heard & Spotte, 1997. Periclimenes platalea has recently been removed from this complex and placed in the genus Rapipontonia Marin by Marin (2007). No examples of these species have been examined but it seems likely that some may possibly be better placed in Phycomenes. Some of these taxa have been reported as associates of coelenterate hosts rather than from sea-grass habitat, but such a coelenterate association has also been reported in the case of the holotype specimen of P. cobourgi found on a gorgonian host. The specimens of P. indicus were kindly donated by the Zoological Survey of India, Calcutta (ZSI). The specimens examined are deposited in the collections of the Northern Territory Museum, Darwin (NTM) and Queensland Museum, Brisbane (QM).

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Gingras, B. A., and C. A. Paszkowski. "Breeding patterns of Common Loons on lakes with three different fish assemblages in north-central Alberta." Canadian Journal of Zoology 77, no. 4 (1999): 600–609. http://dx.doi.org/10.1139/z99-013.

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Studies of the Common Loon, Gavia immer, in eastern Canada and the United States suggest that the species' dependence on fish for food limits its breeding habitat to large deep lakes with stocks of fish sufficient to support adults and chicks. In central Alberta, breeding Common Loons are widespread, occurring on nutrient-rich lakes that vary in morphometry and prey base. From 1993 to 1997, small shallow lakes that were fishless (invertebrates were available as principal prey) or contained small-bodied fishes ("minnow lakes"), as well as larger deeper lakes containing large-bodied fishes ("pike lakes"), were surveyed to determine if the occurrence and breeding patterns of Common Loons were influenced by prey assemblage and habitat type. Territorial pairs occurred on all three lake types, but nesting loons and fledglings were more likely to be present on pike lakes than on fishless or minnow lakes. Fishless lakes offered good nesting sites but chicks rarely fledged. Minnow lakes provided good chick-rearing conditions but loons did not often nest on these lakes.

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31

Kafumbata, Dalitso, Daniel Jamu, and Sosten Chiotha. "Riparian ecosystem resilience and livelihood strategies under test: lessons from Lake Chilwa in Malawi and other lakes in Africa." Philosophical Transactions of the Royal Society B: Biological Sciences 369, no. 1639 (2014): 20130052. http://dx.doi.org/10.1098/rstb.2013.0052.

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This paper reviews the importance of African lakes and their management challenges. African inland lakes contribute significantly to food security, livelihoods and national economies through direct exploitation of fisheries, water resources for irrigation and hydropower generation. Because of these key contributions, the ecosystem services provided are under significant stress mainly owing to high demand by increasing populations, negative anthropogenic impacts on lake catchments and high levels of poverty which result in unsustainable use. Climate variability exacerbates the stress on these ecosystems. Current research findings show that the lakes cannot sustain further development activities on the scale seen over the past few decades. Millions of people are at risk of losing livelihoods through impacts on livestock and wildlife. The review further shows that the problems facing these lakes are beyond the purview of current management practices. A much better understanding of the interactions and feedbacks between different components of the lake socio-ecological systems is needed to address the complex challenges of managing these ecosystem services. This review suggests that the three small wetlands of Chad, Chilwa and Naivasha provide an opportunity for testing novel ideas that integrate sustainability of natural resource management with livelihoods in order to inform policy on how future land use and climatic variability will affect both food security and the ecosystem services associated with it.

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Mills, Tamara K., and Brad A. Andres. "Changes in Loon (Gavia spp.) and Red-necked Grebe (Podiceps grisegena) Populations in the Lower Matanuska-Susitna Valley, Alaska." Canadian Field-Naturalist 118, no. 2 (2004): 210. http://dx.doi.org/10.22621/cfn.v118i2.915.

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More than two-thirds of the human population of Alaska resides in the south-central portion of the state, where its continued growth is likely to affect some wildlife populations negatively. To assess changes in waterbird populations in this region, we compared counts of Common Loons (Gavia immer), Pacific Loons (G. pacifica), and Red-necked Grebes (Podiceps grisegena) made on Matanuska-Susitina Valley lakes. In general, the number of lakes occupied by loon or grebe pairs decreased between 1987 and 1999. Decreases in the number of lakes occupied by Common Loons were less drastic in the northwest region of the study area than in the southeast region; human development is greater in the southeastern portion of our study area. Contrary to lake occupancy, the percentage of lakes that fledged Common Loon chicks remained stable between years. Because the human population is expected to continue to grow, proactive management of lake use and lakeshore development, coupled with monitoring of loon and grebe occupancy and productivity, is needed to ensure the persistence of these waterbird populations in the lower Matanuska-Susitna Valley.

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Chandrababu Naik, B., Prof B. Anuradha, and . "Change detection analysis of reservoirs and lakes in Multi-Temporal Landsat-7 (ETM+) data over the Indian sub-continent during 2008-2018." International Journal of Engineering & Technology 7, no. 4.6 (2018): 122. http://dx.doi.org/10.14419/ijet.v7i4.6.20447.

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Remote sensing change detection techniques are extensively used in numerous applications such as land cover monitoring, disaster monitoring, and urban sprawl. The main motive of this paper study the change detection analysis of Land Use / Land Cover (LULC) in different lakes and Reservoirs, such as Chilika Lake, Pulicat Lake, Vembanad Lake, Penna Reservoir, and Nagarjuna Sagar Reservoir located in the Indian subcontinent region. The analyses and changes are evaluated during period of 2008 - 2018 in multi-temporal Landsat-7 (ETM+) data. The major disadvantage in Landsat-7 for data acquired from satellite sensor, is that it includes strips (gaps) in an image. On May 31, 2003 the Scan-Line-Corrector (SLC) failed completely, due to 22% of pixel information lost in the Landsat-7 data. The focal analysis method is applied to the required image for removing all strips (gaps). Change detection using Image Differencing technique, maximum changed area and unchanged area detect the different Lakes and Reservoirs in the period of 2008-2018. The unsupervised classification is used to compute the accuracy assessment analysis. Excellent results are obtained by using accuracy assessment for different Lakes and Reservoirs from 2008 to 2018, with the overall accuracy of 91.59%, and overall kappa statistics of 0.9032. The percentage of a decreased area is more in 2018 as compared to 2008 and it concludes that the percentage of decreased area is more as compared to the percentage of increased area for acquired Landsat-7 data.

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Gilbertson, M. "Canadian Wildlife Service's Herring Gull Monitoring Program: Importance to the development of environmental policy on organohalogens." Environmental Reviews 9, no. 4 (2001): 261–67. http://dx.doi.org/10.1139/a01-009.

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The biological context for the selection of the herring gull (Larus argentatus), from a long list of candidate species, as an indicator of the restoration of Great Lakes water quality is further elaborated. Embryo mortality and deformities in herring gull chicks led to the hypothesis that the Lake Ontario population was exhibiting chick edema disease. Subsequent observation of the suite of lesions associated with chick edema disease in herring gull chicks led to the hypothesis that the Great Lakes were contaminated with polychlorinated dibenzo-p-dioxins. Forensic toxicology, as a collaboration of environmental chemistry, biology and pathology, could form a rational basis for policy decisions about remedial actions to restore extirpated fish and wildlife populations and to protect public health. Key words: indicator, restoration, diagnosis, forensic toxicology, public health.

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Skyllberg, Ulf, Joakim Lessman, and Per Hansson. "Häckningsmiljöns betydelse för häckningsframgången hos havsfiskande smålom Gavia stellata i Västerbotten." Ornis Svecica 9, no. 3 (1999): 107–20. http://dx.doi.org/10.34080/os.v9.22453.

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In Sweden sea-foraging Red-throated Divers are found only in the north-eastern part, along the Gulf of Bothnia and the Bothian Bay. The breeding biology of these possibly 100–200 pairs is virtually unknown. In this study, the breeding success of 15 pairs of these birds was related to lake and nesting site characteristics. During the years 1993–1998, a total of 53 initiated incubations were recorded in 14 different lakes within a 400 km2 area. Out of a total of 43 well-grown young (28 incubations) all except 5 (3 incubations) were with certainty hatched in nests located on small islets or on floating Spaghnum spp. moss mats. The overall breeding success, expressed as non-fledged, half-grown chicks (large young) per incubation, was 0.81. The breeding success was significantly lower (0.01<p<0.05, Kruskal-Wallis followed by Dunn’s test) in bog-type mire lakes (0.33 young per incubation) than in lakes with a mosaic character of open water, high-grown Carex vegetation and Spaghnum moss mats (0.94 young per incubation). Also in forest lakes, formed in depressions of glacial till, the production was higher than in mire lakes (1.09 young per incubation). It was found that a dense cover of high vegetation close to the nest was the most important factor for the breeding success (p<0.01, Spearman’s rS), whereas distance between the nest and the shore showed a weak statistical significance (0.05<p<0.10). On a lake level scale, it was found that breeding success increased with decreasing percentage open water (i.e. increasing mosaic character, p<0.01, Spearman’s rS) whereas the absolute size of the lake (0.26 to 15.9 ha), maximum distance over open water and distance to the sea (0.3 to 4.0 km) did not seem to affect the breeding success. The influence of predation and yearly fluctuations in lake water level on breeding success are discussed.

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Singh, Alka, and Vishwambhar Nath Sharma. "An empirical comparative study of changing utilization pattern and problems of rural and urban lakes of Gorakhpur, India." National Geographical Journal of India 66, no. 3 (2020): 288–97. http://dx.doi.org/10.48008/ngji.1748.

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Lakes are the natural habitat of aquatic animals and plants. At the same time, it ensures the recharge of groundwater storage and also caters to the recreational and aesthetic requirements of people. A Lake can control surroundings temperature by keeping it fairly constant, this, in turn, can facilitate to support life forms. Balanced ecosystem enabled by lakes promotes not only healthy plants and animal communities but their clean water increases the security of animal nesting and resting places along with the livelihood of humans in its vicinities. Some of the losses (environmental degradation, extinction of species, etc.) occur through intentional exploitation of resources. Lakes are of value to humans in form of drinking water, agriculture, industry, livestock and energy generation; they become storage for flood water; sinks for sediment and contaminants to protect downstream areas and habitat for flora and fauna. Therefore, Lakes experience pressure of high population growth owing to human dependence on them. Economic uses, depleting factors and stewardship of urban and rural lakes are different. This study is a comparative assessment of economic and other utilities, factors of depletion and strategies for stewardship of Ramgarh (urban) and Chilua (rural) lakes of Gorakhpur. The study is based on primary data collected from the surrounding dwellers of both lakes and supported by secondary data collected from different offices and laboratory-based investigations related to lakes.

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Mahapatro, Debasish, Ramachandra Panigrahy, Sudarsan Panda, and Rajani Kanta Mishra. "Malcofaunal Diversity of Chilika Lake, Odisha, India." Proceedings of the Zoological Society 71, no. 3 (2016): 272–80. http://dx.doi.org/10.1007/s12595-016-0204-9.

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Rivett, Michael O., Shona Symon, Lucas Jacobs, et al. "Paleo-Geohydrology of Lake Chilwa, Malawi is the Source of Localised Groundwater Salinity and Rural Water Supply Challenges." Applied Sciences 10, no. 19 (2020): 6909. http://dx.doi.org/10.3390/app10196909.

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Meeting long-term rural community water supply needs requires diligent geohydrological conceptualisation. Study of Malawi’s Lake Chilwa Basin, including sampling of 330 water points in Phalombe District, enabled assessment of groundwater quality influence upon supply. The control of larger Lake Chilwa paleo-environments on current Basin groundwater quality is demonstrated. Lacustrine sediment deposition forming high-level deposits under open lake conditions and terrace deposits under open and closed lake conditions significantly control the groundwater major-ion quality and salinity now observed. Paleo-lake extent marks the transition between low-TDS (total dissolved solids) groundwater suitable for water supply at higher elevations and high-TDS brackish groundwater in areas overlain by lacustrine deposits closer to the current lake level. Low-TDS groundwater is limited to mid-to-low reach influent leakage of rivers incising terraces. Permeable fluvial deposits within the deeper paleo-river channel may possibly provide low-TDS water. The conceptual model, whereby paleo-lake controls groundwater salinity, provides science-based evidence to address policy to manage the significant water point functionality concerns quantified at the district and river basin scales. Targeting of the low-TDS groundwater alongside improved use of upland low-TDS stream/river sources with fewer, but larger capacity, and better maintained gravity-fed supply schemes are recommended. This study hence shows the value of paleo-geohydrology interpretation of the lake–groundwater system conceptualisation to inform Sustainable Development Goal 6 (SDG 6.5.1)—integrated water resources management policy for rural water supply.

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Ching, Hilda Lei. "Occurrence of the eyefluke, Diplostomum (Diplostomum) baeri bucculentum Dubois et Rausch, 1948, in salmonid fishes of northern British Columbia." Canadian Journal of Zoology 63, no. 2 (1985): 396–99. http://dx.doi.org/10.1139/z85-060.

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As a result of experimental infections in chicks, diplostomula found in the retina of chinook salmon from the Nechako River were identified as Diplostomum (Diplostomum) baeri bucculentum. Eyeflukes in other salmonids were considered to be the same species based on similar measurements and site in the eyes. These eyeflukes varied in prevalence and mean intensity in seven salmonid species surveyed in nine localities in 1979–1981. The following fish were sampled: rainbow trout (Salmo gairdneri), 505; mountain whitefish (Prosopium williamsoni), 334; lake whitefish (Coregonus clupeaformis), 32; Dolly Varden (Salvelinus malma), 66; lake trout (S. namaycush), 13; kokanee or sockeye salmon (Oncorhynchus nerka), 323; and chinook salmon (O. tshawytscha), 164. Eyeflukes had prevalences ranging from 84 to 100% in six lakes, 64% in the river, 53% in one reservoir site, and a prevalence of 15% in the other reservoir site. Mountain and lake whitefishes had high mean intensities while kokanee had low mean intensities. Correlation of increased intensity with increased fish size was significant for 6 of 27 samples. Four samples of lake whitefish, mountain whitefish, rainbow trout, and chinook salmon showed significant asymmetry when numbers of diplostomula were compared between eyes. More of the heavily infected fish showed asymmetry than did the lightly infected fish.

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Makwinja, Rodgers, Mphatso Chapotera, Patrick Likongwe, John Banda, and Asaf Chijere. "Location and Roles of Deep Pools in Likangala River during 2012 Recession Period of Lake Chilwa Basin." International Journal of Ecology 2014 (2014): 1–4. http://dx.doi.org/10.1155/2014/294683.

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The ecological study focusing on Likangala River was conducted during the recent (2012) Lake Chilwa recession and aimed at identifying the important pools and the impact of indigenous ecological knowledge on the use and management of the aquatic biodiversity in the pools. An extensive georeferencing of the pools, field observations, and measurement of the pool depths was conducted to locate and map the deep pools along the river. Garmin Etrex Venture HC, GPS, and georeferencing were used to obtain the points and locate the place. Oral interviews with local leaders were conducted to understand the use and management of the pools by communities. The study showed that Likangala River has 17 pools with depths ranging from 1.85 m to 3.6 m. The pools act as habitats and feeding and spawning ground for various aquatic biodiversity. The study further found that some important deep pools have apparently become shallower during the past few years due to increased silt deposition from the upper part of the catchment. The study shows that deep pools are very important during Lake Chilwa recession and recommends the participatory fisheries management as the best way of sustaining the aquatic biodiversity and endangered species in Lake Chilwa basin.

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Mishra, Sujit Kumar, Siba Prasad Mishra, and Kalpataru Das. "Geo-Dynamics, Salinity Gradient, and Vegetation Interdependence in Chilika Lagoon, a Tropical Wetland in Eastern India." Journal of Wetlands Environmental Management 7, no. 1 (2019): 1. http://dx.doi.org/10.20527/jwem.v7i1.186.

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<p>Chilika a shallow brackish lagoon, India, is shrinking for sediment surplus budget. South Mahanadi deltaic branches <em>i.e.</em> Daya and Bhargavi terminate at the southwest swamps of the Lagoon. The annual average salinity of the lake was depleted from 22.31ppt (1957-58) to 8.5 ppt. (1999-2000) as the mixing process of saline and fresh water was influenced from 1995. Trepidation of conversion of Chilika to a atrophied fresh water lake due to blooming population and their hydrologic interventions like Kolleru lake in (India), Aral Lake (Uzbekistan) was apprehended by 1950’s and was alarming by 1999 when the shallow inlet(s) shifted extreme north. The shallow mud flats of lean salinity were reclaimed further for agriculture. The ecology and biodiversity degraded with substantial pecuniary loss to the lagoon dependents. Anthropogenic interventions like, Hirakud dam (1956), dredging of Sipakuda Inlet (2000), Naraj barrage at delta head (2004), Gobardhanpur barrages (1998) and Gabkund cut with weir (2014) were made to the hydraulic system. The deteriorating health, perturbed biodiversity and declined ecosystem of the lagoon has forced to have a comparative study of the various morphologic changes passed over the Chilika with time. The meteorological, hydrologic and the salinity study of the lagoon area for the period 1990 to 2016 have shown changes. Topographic study using GIS is developed by collecting data from Glovis Classic (Google) and the interpretation is done using ERDAS 9.2 software for various geomorphic features (1984 and 2017) before and after the current anthropogenic interventions and compared with previous studies.</p>

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Boukrouma, N. "Breeding Ecology of the Pied Avocet, Recurvirosrta avosetta (Charadriiformes, Recurvirostridae), in Tiffech Lake (Souk Ahras, Northeastern Algeria)." Zoodiversity 55, no. 3 (2021): 201–6. http://dx.doi.org/10.15407/zoo2021.03.201.

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The Pied Avocet (Recurvirostra avosetta Linnaeus, 1758) is a sedentary species in Northeastern Algeria, although numbers present increase during spring and summer. Nesting occurs on the dikes and lakes placed at the different pools of the saltpans. In this study, the breeding ecology of the Pied Avocet was studied during the 2017 breeding season in Tiffech lake wetland (868 m in elevation), Northeastern Algeria. The Pied Avocets arrived, at Tiffech Lake in early February and usually spent a few days in flocks before dispersing to set up territories. Egg-laying occurred from 11 April to 21 June, with two distinct peaks (last 15 days of April and May) and incubation period was 27.0 days. The present study indicates the expanded, breeding season. Clutch and egg size of this high-elevation population was comparable to lowland counterparts. Hatching success was 85.77 % and mean net productivity was 0.63 chicks per nest. Entire nest failure from human predation and sheep grazing was responsible for most egg losses.

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Patro, B. N., P. K. Mishra, and P. K. Rao. "Chilika buffaloes in Orissa: a unique germplasm." Animal Genetic Resources Information 33 (April 2003): 73–79. http://dx.doi.org/10.1017/s1014233900001644.

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SummaryPeople in the villages situated on the bank of the famous salt lake Chilika in Orissa rear buffaloes with almost zero input. These animals, endowed with the special quality of entering deep into the lake and feeding on the vegetation that grows there, help to maintain the natural ecosystem and provide good earnings for the rural people. This biodiversity in buffalo germplasm needs to be preserved. The mean body length, girth, height at withers and weight were 122.3±0.2 cm, 169.7±0.3 cm, 123.9±2.7 cm and 320.0±0.7 kg, respectively. The mean age at first calving was 1 331.4±6.8 days. The average of the first two calving intervals was 431.7±3.6 days. The average daily milk yield of the first three lactations and lactation length was 2.6±0.01 kg and 238.7±2.1 days, respectively. Most of the economic traits had high heritability. The temperature of the habitat ranges approximately between 15°C in winter to 40°C in summer.

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Fox, G. A., L. J. Allan, D. V. Weseloh, and P. Mineau. "The diet of herring gulls during the nesting period in Canadian waters of the Great Lakes." Canadian Journal of Zoology 68, no. 6 (1990): 1075–85. http://dx.doi.org/10.1139/z90-159.

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We report the content of 132 boli and 2000 pellets regurgitated by adults and 1749 boli regurgitated for or by chicks in 25 herring gull (Larus argentatus) colonies in Lakes Ontario, Erie, Huron and Superior, between mid-April and mid-July, 1977–1983. Fish were the predominant food in all four lakes. Although 11 families of fish and a minimum of 16 species were identified, 80% of the fish were of two exotic species, the alewife (Alosa pseudoharengus) and the rainbow smelt (Osmerus mordax). The dietary importance of these two fish species reflected their relative abundance within a lake. In addition, representatives of eight orders of insects and 11 families of birds were identified. In the one colony where diets of birds of known sex were quantified, male and female gulls fed on different proportions of alewife and smelt, suggesting the sexes have different foraging strategies. Although some food was scavenged, most was obtained alive. Dietary differences existed between colonies and between lakes, both within and between years. We suggest that diet, contaminant burden, and population size of Great Lakes herring gulls will be affected by fisheries policies which alter the predator–prey dynamics of this exotic-dominated ecosystem.

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Hogarth, D. D., C. T. Williams, and P. Jones. "Primary zoning in pyrochlore group minerals from carbonatites." Mineralogical Magazine 64, no. 4 (2000): 683–97. http://dx.doi.org/10.1180/002646100549544.

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AbstractPyrochlore group minerals have the general formula A16–xB16O48Z8–y·nH2O, with A mainly Na, Ca, Sr, REE, Th, U; B mainly Nb, Ta, Ti and Z being O, F, OH. In this study, pyrochlore specimens were examined from carbonatites at Argor, Carillon Dam, Chilwa Island, Fen, Lueshe, Oka, Mbeya, Meech Lake and Verity. Primary features include a background with little compositional variation, from core to rim, upon which are commonly superimposed narrow oscillatory zones, parallel to {111}. These zones are usually characterized by high Ta, in many cases coupled with U (here Argor, Meech Lake and Verity specimens), but Chilwa Island and Fen pyrochlores have little Ta and zonation is mainly by enrichment in Ce and Nb. Primary zonation may persist through high-temperature metamorphism (Meech Lake and Verity) and metamictization (Meech Lake). Oscillatory zones were generated by a disequilibrium system that cooled under tranquil conditions, signalling absence of magma turbulence and, in many cases, the end of crystal growth. Some fresh crystals (Oka, Fen) have no oscillatory zones, possibly the product of magma turbulence in space or time. Low-temperature effects may mimic those of primary high temperature and are especially characterized by replacement rims, pyrochlore-inpyrochlore veinlets and low A-ion totals (Carillon Dam, Lueshe, Myeba).

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Sasamal, S. K., S. B. Chaudhury, R. N. Samal, and A. K. Pattanaik. "QuickBird spots flamingos off Nalabana Island, Chilika Lake, India." International Journal of Remote Sensing 29, no. 16 (2008): 4865–70. http://dx.doi.org/10.1080/01431160701814336.

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Das, Lalatendu Keshari. "Social Movements– Judicial Activism Nexus and Neoliberal Transformation in India: Revisiting Save Chilika Movement." Sociological Bulletin 67, no. 1 (2018): 84–102. http://dx.doi.org/10.1177/0038022917751979.

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Both the supporters and distractors of ‘social movements–judicial activism nexus’ project litigation strategies as the greatest challenge to neoliberal transformation in India. This fieldwork-based study on shrimp cultivation in Chilika Lake shows otherwise. By historically situating the developments in Chilika, it shows that in case of unpopular economic policies during the neoliberal period, the judiciary and other state agencies follow a revolving-door strategy and continuously externalise the problematic of resource conflicts by creating a regime of blame-avoidance. This regime nullifies the unity of the communities fighting dispossession by reducing the social movements to immediate livelihood concerns of the masses.

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McKinnell, Skip. "Modelling salmon migration as a mixture problem." Canadian Journal of Fisheries and Aquatic Sciences 76, no. 6 (2019): 856–70. http://dx.doi.org/10.1139/cjfas-2017-0546.

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Pulses of abundance in salmon migrations can arise from single populations arriving at different times, from multiple populations with different timing characteristics, or as a combination of these. Daily observations typically record an aggregate measure of abundance passing some location rather than the abundances of the individual components. An objective method is described that partitions a compound migration into its component parts by exploiting differences in the characteristics of each pulse. Simulated data were used to demonstrate when greater model complexity may be desirable. Three case studies of increasing complexity (Chilko Lake sockeye salmon smolts (Oncorhynchus nerka), large adult Columbia River Chinook salmon (Oncorhynchus tshawytscha), Fraser River salmon test fishery) demonstrate how the model can be applied in practice. Results indicated that Chilko Lake smolts rarely emigrate to sea as a single pulse, that the dates used to distinguish the spring run of Chinook salmon in the Columbia River may be overestimating its abundance, and that pulses of sockeye salmon abundance in a Fraser River ocean test fishery in 2014 may have arisen from some factor other than population composition.

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Naeher, Sebastian, Ryan P. North, Adrian Gilli, David M. Livingstonec, and Carsten J. Schubert. "Lake Sediments Tell the Story of Climate Change." CHIMIA International Journal for Chemistry 68, no. 5 (2014): 333. http://dx.doi.org/10.2533/chimia.2014.333.

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Sahoo, Debasish, Nivedita Sahu, and Dinabandhu Sahoo. "A Critical Survey of Seaweed Diversity of Chilika Lake, India." ALGAE 18, no. 1 (2003): 1–12. http://dx.doi.org/10.4490/algae.2003.18.1.001.

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Journal articles on the topic 'Chilka Lake'

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