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Journal articles on the topic 'Megalopa'

Author: Grafiati

Published: 10 September 2021

Last updated: 17 July 2025

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1

Gunarto, Gunarto, Herlinah Herlinah, and Bunga Rante Tampangalo. "Effect of different salinity levels on megalopa Scylla tranquebarica (Fabricius, 1798) rearing to the crablet production." BIO Web of Conferences 74 (2023): 01011. http://dx.doi.org/10.1051/bioconf/20237401011.

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The salinity level for the culture of megalopae affects crablet production. The research aimed to determine the optimum salinity level for the megalopa of S. tranquebarica rearing. Nine aquariums randomly selected and filled with sterile seawater, have different salinity levels (A. 29-30 ppt, B. 27-28 ppt, and C. 25-26 ppt) used for megalopae rearing. Each aquarium is stocked with 30 individuals of megalopa. Each treatment with three replications. Crumble pellets and Artemia nauplii are given as feed for megalopae. Monitoring in each treatment consists of total hemocytes, the osmolality of meg

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2

Trần, Thị Thanh Hiền, та Tâm Nguyên Lâm. "Thay thế Aremia bằng thức ăn chế biến ương ấu trùng cua biển Scylla paramamosain". Can Tho University Journal of Science 58, № 3 (2022): 251–58. http://dx.doi.org/10.22144/ctu.jvn.2022.078.

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Nghiên cứu nhắm đánh giá khả năng thay thế Artemia bằng thức ăn chế biến (TACB) để ương ấu trùng cua biển Scylla paramamosain từ Zoe 3 lên cua 1. Nghiên cứu được thực hiện với 2 thí nghiệm: ương từ giai đoạn Zoe 3 lên megalop và từ megalop lên cua 1. Mỗi thí nghiệm gồm 6 nghiệm thức, được bố trí ngẫu nhiên với 5 lần lặp lại. Thí nghiệm được bố trí với chế độ cho ăn 5 lần/ngày cho tất cả các nghiệm thức, nghiệm thức đối chứng cho ăn hoàn toàn Artemia, nghiệm thức TACB cho ăn hoàn toàn thức ăn chế biến. Bốn nghiệm thức còn lại được thay thế từ 1- 4 lần Artemia bằng thức ăn chế biến, Kết quả tỷ l

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3

Marques, Fernando, and Gerhard Pohle. "Laboratory-reared larval stages of Dissodactylus mellitae (Decapoda: Braohyura: Pinnotheridae) and developmental patterns within the Dissodactylus species complex." Canadian Journal of Zoology 74, no. 1 (1996): 47–62. http://dx.doi.org/10.1139/z96-007.

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Eggs of Dissodactylus mellitae were incubated for 9–10 days at 28 °C and larval development consisted of three or four zoeal stages and a megalopa. Beginning with the first zoea, the mean duration of successive stages was 5, 3, 4, and 5 days, the first megalopa appearing 10 days after hatching. Among the megalopae obtained, 87% molted from a third zoea, whereas 13% passed through a fourth zoeal stage before metamorphosing to a megalopa. The last zoea is not considered a substage, since it showed no morphological variation, and molting resulted in growth and consistent morphological changes. Co

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4

KORNIENKO, ELENA S., and OLGA M. KORN. "Morphology of the complete larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae)." Zootaxa 2990, no. 1 (2011): 45. http://dx.doi.org/10.11646/zootaxa.2990.1.3.

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Larval development of the symbiotic crab Sestrostoma balssi (Shen, 1932) (Varunidae: Gaeticinae) inhabiting Russian waters of the Sea of Japan is described and illustrated for the first time from material reared in the laboratory. The development includes five zoeal and a single megalopal stages. The first megalopa was attained at 20–22°C 35 days after hatching. The present paper is the first description of the complete larval development in the genus Sestrostoma. The larvae of S. balssi share all principal characters of the family Varunidae but are distinguished from the typical varunid larva

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5

Pohle, Gerhard W. "Dissodactylus xantusi and Dissodactylus lockingtoni (Decapoda: Brachyura: Pinnotheridae): larval development of two sympatric Pacific species." Canadian Journal of Zoology 72, no. 4 (1994): 575–90. http://dx.doi.org/10.1139/z94-080.

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Dissodactylus xantusi and D. lockingtoni are small pinnotherid crabs living with D. nitidus as ectosymbionts on the Pacific sand dollars Encope grandis, E. californica, E. micropora, and Mellita longifissa. Like D. nitidus, D. xantusi and D. lockingtoni develop through four zoeal stages before metamorphosing to the megalopa. This is in contrast to the Atlantic species with known larval development, which all have three zoeal stages. All larval stages are described in detail, including the distribution of chromatophores and the types of setae. Beginning with the first zoea, the mean durations o

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6

Islam, M. L., M. S. Islam, K. Yahya, and R. Hashim. "Effects of Essential Fatty Acids Containing Natural and Commercial Diets on Larvae Rearing of the Green Mud Crab Scylla Paramamosain (Estampador 1949)." Journal of Scientific Research 9, no. 1 (2017): 109–26. http://dx.doi.org/10.3329/jsr.v1i1.28805.

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Effect of essential fatty acids (EFA) on growth and survival of the green mud crab (Scylla paramamosain) larvae was assessed by feeding with natural to commercial diets. The feeding schemes were: larvae reared with Artemia (T1); larvae initially fed with rotifers (up to Z2) and ended (Z3 to megalopa) with Artemia (T2); and larvae fed with rotifers up to Z2 and ended (Z3 to megalopa) with commercial diet (T3). The commercial diet had significantly (p<0.05) higher levels of docosahexaenoic acid (11.23%), ?n-3s (15.90%) and ?n-6s (4.21%); and lacked in eicosapentaenoic acid (2.25%) than roti

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7

Wu, X. G., C. S. Zeng, and P. C. Southgate. "Ontogenetic patterns of growth and lipid composition changes of blue swimmer crab larvae: insights into larval biology and lipid nutrition." Marine and Freshwater Research 65, no. 3 (2014): 228. http://dx.doi.org/10.1071/mf13078.

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Blue swimmer crab, Portunus pelagicus, is a commercially important crab throughout the Indo-Pacific region, that plays an important role in the food chains of coastal ecosystems. P. pelagicus undergoes four pelagic zoeal stages and a post-larval megalopal stage before settling as benthic juvenile; however, very limited information is available on larval biology and lipid nutrition of this species. The present comprehensive study investigated survival, growth and ontogenetic changes in lipid composition of P. pelagicus larvae under laboratory conditions. Larvae were fed rotifers (zoea I), rotif

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8

NEGREIROS-FRANSOZO, MARIA LUCIA, NADIA MEYERS, VÍVIAN FRANSOZO, and SUSAN THORTON-DE VICTOR. "The megalopa stage of Portunus spinimanus Latreille, 1819 and Portunus gibbesii (Stimpson, 1859) (Decapoda, Brachyura, Portunidae) from the southeastern Atlantic coast of the United States." Zootaxa 1638, no. 1 (2007): 21–37. http://dx.doi.org/10.11646/zootaxa.1638.1.2.

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The identification of megalopae from plankton samples is difficult, because this larval stage is the least well known among crab larvae, unknown in some species and poorly described in others. Wild megalopa specimens of some swimming crabs (family Portunidae Rafinesque, 1815) were captured alive from neuston samples obtained during summer surveys near the coast of Charleston, South Carolina (U.S.A). For identification purposes, larvae were reared to the 8th juvenile instar. After reaching the 5th juvenile instar, the juvenile crabs exhibited morphological features suitable for identification t

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Lima, Jô de F., Fernando Abrunhosa, and Petrônio A. Coelho. "The larval development of Pinnixa gracilipes Coelho (Decapoda, Pinnotheridae) reared in the laboratory." Revista Brasileira de Zoologia 23, no. 2 (2006): 480–89. http://dx.doi.org/10.1590/s0101-81752006000200023.

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Pinnixa gracilipes Coelho, 1997 is a small pinnotherid crab living in association with ghost shrimp Lepidophthalmus siriboia Felder & Rodrigues, 1993 in the northeastern region of Pará State, Brazil. Larvae of P. gracilipes were reared in the laboratory from hatching to the megalopa stage. The complete zoeal period averaged 24 days. Mean duration for each larval stage was 5, 4, 4, 5 and 6 days, respectively. In the present study, five zoeal and megalopal stages are described and illustrated in detail. Morphological comparisons with previous reported works on Pinnotheridae larvae are briefl

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10

AL-AIDAROOS, ALI M., A. A. J. KUMAR, AHMED E. AL-HAJ, ABDULMOHSIN AL-SOFYANI, MICHAEL P. CROSBY, and MOHSEN M. EL-SHERBINY. "Morphology of the complete larval stages of Portunus segnis (Forskål, 1775) (Crustacea: Brachyura: Portunidae) from the Gulf of Aqaba, Saudi Arabia." Zootaxa 4638, no. 2 (2019): 199–218. http://dx.doi.org/10.11646/zootaxa.4638.2.2.

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Portunus pelagicus (Linnaeus, 1758) sensu lato has been recognized as a species complex comprising four species. Of these four species, the larval stages of all except Portunus segnis (Forskål, 1775), have been described. The larvae of P. segnis, hatched from an ovigerous female, caught in the Gulf of Aqaba, were cultured in the laboratory up to the megalopa stage. All the larval stages are described herein for the first time. The number of aesthetascs of the antennules of all the zoeal stages of P. segnis differs from those of the larvae of the other species of the P. pelagicus species comple

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11

Sedova, N. A., and S. S. Grigoriev. "Megalopa of Mesocrangon intermedia (Decapoda: Crangonidae) from the eastern part of the Sea of Okhotsk." Zoosystematica Rossica 23, no. 2 (2014): 188–96. http://dx.doi.org/10.31610/zsr/2014.23.2.188.

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For the first time megalopa of Mesocrangon intermedia is described. The megalopa can be distinguished from that of the Crangon and Neocrangon by the morphology of its telson and carapace. The main distinguishing features of megalopa of M. intermedia were two spines on medial line of the carapace, a relatively long rostrum, a relatively narrow antennal scale, and the distinctive length of the terminal setae on the telson. Drawings of general view and individual limbs are presented.

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12

Anger, Klaus, Gabriela Torres, and Uwe Nettelmann. "Adaptive traits in ecology, reproduction and early life history of Sesarma meridies, an endemic stream crab from Jamaica." Marine and Freshwater Research 58, no. 8 (2007): 743. http://dx.doi.org/10.1071/mf06176.

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The endemic Jamaican freshwater crab Sesarma meridies lives in shady microhabitats on river banks, where temperature and pH are lower and ion concentrations higher than in mid-stream water. Ovigerous females were found to release up to 140 yolk-rich larvae (hatching period: 1 week; >90% at night). Larval development comprised two fully lecithotrophic zoeal stages and a feeding megalopa, which was also able to develop without food (facultative lecithotrophy). After metamorphosis in complete absence of food, juvenile crabs showed reduced body size, delayed moulting, and enhanced mortality. En

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13

Juwana, Sri, Indra Aswandy, and M. G. Lily Pangabean. "LARVAL DEVELOPMENT OF THE INDONESIAN BLUE SWIMMING CRAB, PORTUNUS PELAGICUS (L) (CRUSTACEA : DECAPODA : PORTUNIDAE) REARED IN THE LABORATORY." Marine Research in Indonesia 26, no. 1 (1987): 29. http://dx.doi.org/10.14203/mri.v26i0.406.

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A number of 137,870 freshly hatched larvae of Portunus pelagicus (L) were reared in one thousand litre container. The combination of Brachionus plicatilis and newly hatched nauplii of Artemia salina were fed to the larvae. The number of megalopa obtained was only 277. Ecological factor such as temperature, salinity, pH and dissolved oxygen were recorded. The effect of different food sources of the previous authors are compared. The detail description of the four zoeal stages and one megalopal stage are made and figured with emphasis on the number and type of setae on each appendages. A pattern

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14

Juwana, Sri, Indra Aswandy, and M. G. Lily Pangabean. "LARVAL DEVELOPMENT OF THE INDONESIAN BLUE SWIMMING CRAB, PORTUNUS PELAGICUS (L) (CRUSTACEA : DECAPODA : PORTUNIDAE) REARED IN THE LABORATORY." Marine Research in Indonesia 26 (May 11, 1987): 29–49. http://dx.doi.org/10.14203/mri.v26i1.406.

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A number of 137,870 freshly hatched larvae of Portunus pelagicus (L) were reared in one thousand litre container. The combination of Brachionus plicatilis and newly hatched nauplii of Artemia salina were fed to the larvae. The number of megalopa obtained was only 277. Ecological factor such as temperature, salinity, pH and dissolved oxygen were recorded. The effect of different food sources of the previous authors are compared. The detail description of the four zoeal stages and one megalopal stage are made and figured with emphasis on the number and type of setae on each appendages. A pattern

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15

Garcia-Guerrero, Marcelo U., Antonio Rodríguez, and Michel E. Hendrickx. "Larval development of the eastern Pacific anomuran crab Porcellana cancrisocialis (Crustacea: Decapoda: Anomura: Porcellanidae) described from laboratory reared material." Journal of the Marine Biological Association of the United Kingdom 86, no. 5 (2006): 1123–32. http://dx.doi.org/10.1017/s002531540601410x.

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The two zoeal and megalopal stages of Porcellana cancrisocialis are described and illustrated from laboratory-reared larvae. At an average temperature of 25°C, Zoea I of P. cancrisocialis lasted seven days before moulting to Zoea II which, in turn, lasted eight days to reach the megalopa. Larval features of P. cancrisocialis are compared with those of other species of Porcellana. Porcellana cancrisocialis exhibits similar but distinguishable features from those observed in Porcellana sigsbeiana and Porcellana platycheles. This species resembles P. sigsbeiana more than P. platycheles in the set

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Park, Kie-Young, Heum-Gi Park, Woo-Suck Hong, and O.-Nam Kwon. "Effects of lipid enrichment of Artemia nauplii for feeding of spiny lebbeid shrimp, Lebbeus groenlandicus (Fabricius, 1775), zoea larvae." Crustaceana 89, no. 10 (2016): 1125–34. http://dx.doi.org/10.1163/15685403-00003580.

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This study was conducted to determine the optimum feed selection for the spiny lebbeid shrimp, Lebbeus groenlandicus, from zoea to megalopa larva. To the shrimp zoeae, untreated hatching Artemia meta-nauplii, or either of two kinds of enriched Artemia, were supplied as feed daily, in a concentration of 3 individuals/ml. Throughout the experimental trials, 17.6-18.1 days elapsed until reaching the megalopa larval stage. In the starving trials, no mortality was observed; the mortality values observed in the experimental trials, between 4.8 and 9.5% were considered low and not significantly diffe

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Kornienko, Elena S., and Olga M. Korn. "The larval development of Pagurus proximus (Decapoda: Anomura: Paguridae) reared in the laboratory." Journal of the Marine Biological Association of the United Kingdom 86, no. 2 (2006): 369–81. http://dx.doi.org/10.1017/s0025315406013221.

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The larval development of the hermit crab Pagurus proximus is described and illustrated from the larvae reared in the laboratory. The development included four zoea and a single megalopa, thus following the typical pattern in the Paguridae. At 20–22°C megalopa of P. proximus was attained 17 to 23 days after hatching. Morphological characters of zoea and megalopa of P. proximus are compared with those described for the related species P. brachiomastus. The distinctive differences between larvae of these two species lend support to the separation of P. proximus from P. brachiomastus. The main la

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Pires, Marcus Alexandre Borges, José Carlos Guimarães Junior, and Mário Junior Saviato. "DESENVOLVIMENTO E MORFOLOGIA FUNCIONAL DO ESTÔMAGO DE LARVAS E MEGALOPA DE MINUCA RAPAX (SMITH, 1870) (DECAPODA,BRACHYURA)." Revista ft 29, no. 144 (2025): 15–16. https://doi.org/10.69849/revistaft/fa10202503082115.

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Development and functional morphology of the foregut of larvae and megalopa of Minuca rapax (Herbest, 1804) (Decapoda, Brachyura). The knowledge of feeding behavior of larvae and megalopa of decapod may be considered of real importance for obtaining successful larval culture. Information on morphological development of the foregut may be used as contribution in larval culture, because its reveals king of food or, weather there is lecithotrophy at some, or even, at whole larval cycle. The structural development of the foregut and digestive function were examined in the present study, for larvae

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Xue, Wenlei, Hao Wu, Xinyu Wu, Nannan Li, Ximei Nie, and Tianheng Gao. "Early Succession of Community Structures and Biotic Interactions of Gut Microbes in Eriocheir sinensis Megalopa after Desalination." Microorganisms 12, no. 3 (2024): 560. http://dx.doi.org/10.3390/microorganisms12030560.

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As an enduring Chinese freshwater aquaculture product, the Eriocheir sinensis has a high economic value and is characterized by a catadromous life style that undergoes seawater–freshwater migration. However, little is known about their gut microbial status as they move from saltwater to freshwater acclimatization. Here, we sampled and cultivated Eriocheir sinensis megalopa from three aquaculture desalination ponds and investigated their gut microbiota diversity, community structures and biotic interactions from megalopa stage to the first juvenile stage after desalination for 9 days. Our resul

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Haryati, Haryati, Yushinta Fujaya, and Early Septiningsih. "THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)." Indonesian Aquaculture Journal 13, no. 2 (2018): 63. http://dx.doi.org/10.15578/iaj.13.2.2018.63-69.

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Live foods such as rotifers and Artemia are commonly used as foods in larval rearing of mud crab (S. olivacea). However, the continuous availability and nutritional consistency of live foods are difficult to control. Thus, the development of artificial diets to partially or fully replaced live foods is needed to overcome the limitations of live foods. The purpose of this research was to determine the best stage at which mud crab larvae can be weaned from live foods to artificial diets. The research experiment consisted of: treatment-1, the larvae were fed with live foods from zoea-1 to megalop

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GUERAO, GUILLERMO, PERE ABELLÓ, and CORAL HISPANO. "Morphology of the larval stages of the spider crab Herbstia condyliata (Fabricius, 1787) (Brachyura: Majoidea: Pisidae) obtained in laboratory conditions." Zootaxa 1726, no. 1 (2008): 1. http://dx.doi.org/10.11646/zootaxa.1726.1.1.

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The complete larval development of the majoid crab Herbstia condyliata (Fabricius, 1787) from the western Mediterranean was obtained from laboratory culture. All larval stages (two zoeal stages and the megalopa) are described and illustrated in detail for the first time. The morphology of the zoeae and megalopa is compared with the corresponding stages of other known species of the family Pisidae. The zoeal stages of H. condyliata present a pleon with unusual characters within the Pisidae such as the presence of dorsolateral processes in pleomere 3, two dorsal setae in pleomeres 2–4 (second zo

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Negreiros-Fransozo, Maria L., Adilson Fransozo, and Gustavo L. Hirose. "The megalopa and early juvenile development of Hepatus pudibundus (Crustacea: Brachyura: Aethroidea) reared from neuston samples." Revista Brasileira de Zoologia 25, no. 4 (2008): 608–16. http://dx.doi.org/10.1590/s0101-81752008000400005.

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Hepatus pudibundus (Herbst, 1785) is a crab commonly found in shallow waters of the Western Atlantic. Its larval and early post-larval morphology have already been described from laboratory hatched material. Around 200 megalopae of H. pudibundus were collected in neuston samples from the Ubatuba region, Brazil, during the summer of 2005-2006 and were successfully reared under laboratory conditions. The size of the megalopae obtained in the neuston was similar to those specimens previously described in the literature, except that the juvenile crab stages reared in the laboratory were slightly l

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Melo, Marlon Aguiar, Fernando Abrunhosa, and Iracilda Sampaio. "The morphology of the foregut of larvae and postlarva of Sesarma curacaoense De Man, 1892: a species with facultative lecithotrophy during larval development." Acta Amazonica 36, no. 3 (2006): 375–80. http://dx.doi.org/10.1590/s0044-59672006000300014.

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Previous study on the resistance of larvae of Sesarma curacaoense submitted to starvation has revealed a facultative lecithotrophy during zoeal stages, but megalopa and first juvenile stages are exclusively feeding stages. In the present study, the gross morphology and fine structure of the foregut of S. curacaoense were investigated during larval, megalopa and first juvenile stages. The foregut of the zoea I show specific setae and a filter press apparently functional. The foregut undergoes changes in the zoea II (last larval stage) with increment of setae number, mainly on the cardiopyloric

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de Araujo Cordeiro, Anny Izabelly, Cassiana Baptista Metri, Kelly Ferreira Cottens, and Junior Ferreira de Souza Dias. "Áreas de dispersão e recrutamento de larvas do caranguejo-uçá, Ucides cordatus, nos Manguezais Paranaenses." Biodiversidade Brasileira 14, no. 3 (2024): 51–70. http://dx.doi.org/10.37002/biodiversidadebrasileira.v14i3.2542.

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O caranguejo-uçá, Ucides cordatus, é uma espécie endêmica de manguezais com grande importância econômica e ecológica no litoral brasileiro. Sua reprodução ocorre nos meses de verão e inclui seis estágios de larvas planctônicas que se desenvolvem na região marinha, e regressam ao estuário na fase de megalopa. Nesta pesquisa foi investigada a presença de larvas de U. cordatus e a distribuição temporal dos estágios larvais, com objetivo de gerar subsídios para classificar as áreas de manguezais do Complexo Estuarino de Paranaguá (CEP), no Paraná, quanto à ocorrência da exportação e o recrutamento

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Hiyodo, Célia Mary, Maria Lúcia Negreiros Fransozo, and Adilson Fransozo. "Larval Development of the Spider Crab Acanthonyx Petiverii H. Milne Edwards, 1834 (Decapoda, Majidae) in the Laboratory." Crustaceana 66, no. 1 (1994): 53–66. http://dx.doi.org/10.1163/156854094x00152.

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AbstractThe larval development of Acanthonyx petiaerii H. M. Edwards, 1834, was studied in the laboratory through eggs hatched from ovigerous females collected in Ubatuba, state of São Paulo, Brazil. The rearings were carried out in a climatic room with constant temperature (25° ±1° C) and salinity (34,5‰). The larvae were maintained individually and the food consisted of Artemia nauplii. The larval development of A. petiverii consists of two zoeal stages and a megalopa. All the larval stages were drawn and described in detail. Tables include those presenting morphological characters that allo

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Marco-Herrero, Elena, J. Ignacio González-Gordillo, and José A. Cuesta. "Larval morphology of the family Parthenopidae, with the description of the megalopa stage of Derilambrus angulifrons (Latreille, 1825) (Decapoda: Brachyura), identified by DNA barcode." Journal of the Marine Biological Association of the United Kingdom 95, no. 3 (2014): 513–21. http://dx.doi.org/10.1017/s0025315414001908.

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Although Parthenopidae is a brachyuran decapod family comprising almost 140 species, there is little knowledge about its larval morphology. There are only two complete larval developments reared in the laboratory and some larval stages described for seven species. In the present work these data are compared and analysed. A summary is made of the larval features that characterize parthenopids that can be used to distinguish them from other brachyuran larvae. In addition, the megalopa stage of Derilambrus angulifrons and Parthenopoides massena was collected from plankton and identified by DNA ba

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Martin, Joel W., and Ana Dittel. "The megalopa stage of the hydrothermal vent crab genus Bythograea (Crustacea, Decapoda, Bythograeidae)." Zoosystema 29, no. 2 (2007): 365–79. https://doi.org/10.5281/zenodo.5391255.

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Maneein, Rachata, Camille Martinand-Mari, Julien Claude, Jirarach Kitana, and Noppadon Kitana. "Embryological development of the freshwater crab Esanthelphusa nani (Naiyanetr, 1984) (Brachyura: Gecarcinucidae) using confocal laser scanning microscopy." Journal of Crustacean Biology 40, no. 2 (2020): 162–71. http://dx.doi.org/10.1093/jcbiol/ruaa002.

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Abstract We investigated the embryological development of Esanthelphusa nani (Naiyanetr, 1984), a common rice-field crab in northern Thailand, using confocal laser scanning microscopy. The development of E. nani can be completed in eggs within 12 d resulting in a hatchling stage corresponding to the megalopa stage. Pre-organogenetic stages were characterized by a superficial cleavage, including egg cleavage, egg blastula, and egg gastrula. Organogenesis stages were identified by the appearances of appendages and was divided into egg nauplius, egg zoea, and egg megalopa. Crabs metamorphose to j

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Quy, Ong Moc, Ravi Fotedar, and Ho Thi Truong Thy. "Extension of Rotifer (Brachionus Plicatilis) Inclusions in the Larval Diets of Mud Crab, Scylla Paramamosain (Estampodor, 1949): Effects on Survival, Growth, Metamorphosis and Development Time." Modern Applied Science 12, no. 1 (2017): 65. http://dx.doi.org/10.5539/mas.v12n1p65.

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The study evaluated the effects of extended dietary inclusions of rotifers (Brachionus plicatilis) on the survival, metamorphosis rate, growth and development time in the larvae of mud crabs (Scylla paramamosain). The five most commonly published feeding regimes of mud crab (S. paramamosain) larvae were selected and tested by including rotifers onto them. Mud crab larvae in the first feeding regime were fed exclusively with Artemia nauplii (control or regime A), while those in feeding regimes 2, 3, 4 and 5 were fed rotifers starting from zoea 1 (Z1) to various development stages of mud crab la

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Turini, Tassia, Jéssica Colavite, Juan A. Bolaños, Jesús Enrique Hernández, Juan Antonio Baeza, and William Santana. "Larval development of the Caribbean king crab Maguimithrax spinosissimus (Lamarck, 1818), the largest brachyuran in the western Atlantic (Crustacea: Decapoda: Majoidea)." Journal of the Marine Biological Association of the United Kingdom 101, no. 3 (2021): 577–89. http://dx.doi.org/10.1017/s0025315421000515.

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AbstractThe complete larval development of the spider crab Maguimithrax spinosissimus (Lamarck, 1818) is re-described and illustrated in detail from laboratory-reared material. The development consisted of the typical pattern reported for the Majoidea, two zoeal stages and one megalopa. The complete larval development from hatching to first crab lasted 5–6 days at temperatures that ranged between 24–28 °C. Both zoeal stages of M. spinosissimus exhibited moderate reduction in the number of setae in the maxilla and maxillipeds, from the first to the second zoeal stage, when compared with other c

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Hernández, Jesús E., José Luis Palazón-Fernández, Gonzalo Hernández, and Juan Bolaños. "The effect of temperature and salinity on the larval development of Stenorhynchus seticornis (Brachyura: Inachidae) reared in the laboratory." Journal of the Marine Biological Association of the United Kingdom 92, no. 3 (2010): 505–13. http://dx.doi.org/10.1017/s0025315410000809.

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Larvae of Stenorhynchus seticornis were reared in the laboratory in a factorial experiment employing three temperatures (22, 25 and 28°C) and three salinities (30, 35 and 40‰) to determine the effects of these variables on the survival and duration of the larval stages. Larvae from five females were subdivided in six groups of 10 and reared in glass bowls containing 125 ml filtered and UV-irradiated seawater at different temperature–salinity combinations. Larvae were transferred daily to clean bowls with newly hatched Artemia nauplii, and the number of moults and mortality within each bowl was

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Susanto, Bambang, Irwan Setyadi, and Haryanti Haryanti. "PENGARUH SISTEM PENGELOLAAN AIR TERHADAP Produksi masSal benih rajungan (Portunus pelagicus)." Jurnal Riset Akuakultur 1, no. 2 (2006): 271. http://dx.doi.org/10.15578/jra.1.2.2006.271-280.

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Penelitian ini dilakukan untuk mengetahui air pemeliharaan yang sesuai untuk larva rajungan dan dapat diaplikasikan dalam perbenihan rajungan. Penelitian menggunakan bak beton volume 3.000 liter yang dilengkapi dengan sistem aerasi, dan ditebar larva (zoea-1) dengan kepadatan 75 ind./L. Perlakuan air pemeliharaan untuk larva rajungan adalah A: air yang telah melalui filter pasir; B: air yang telah dikhlorin; C: air tanpa filtrasi. Hasil penelitian menunjukkan bahwa persentase sintasan, vitalitas, dan pertumbuhan rajungan stadia megalopa yang terbaik adalah perlakuan klorinasi (B). Sintasan raj

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Silva, Ubiratã A. T. da, Kelly Cottens, Robson Ventura, Walter A. Boeger, and Antonio Ostrensky. "Different pathways in the larval development of the crab Ucides cordatus (Decapoda, Ocypodidae) and their relation with high mortality rates by the end of massive larvicultures." Pesquisa Veterinária Brasileira 32, no. 4 (2012): 284–88. http://dx.doi.org/10.1590/s0100-736x2012000400002.

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One of the most limiting factors affecting the larval rearing of Ucides cordatus in the laboratory is a period of high mortality, which usually occurs late in the course of the larviculture during the metamorphosis from the zoeal to the megalopal phase. The objective of the present research was to analyze the post-embryonic development of U. cordatus on an individual basis and, in particular, to search for patterns linking disturbances in the molting process to the high larval death rates observed in massive larvicultures. A total of 50 larvae were individually reared from hatching to metamorp

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Abrunhosa, Fernando A., Marcus Alexandre B. Pires, Jô de Faria Lima, and Petrônio Alves Coelho-Filho. "Larval development of Lepidophthalmus siriboia Felder & Rodrigues, 1993 (Decapoda: Thalassinidea) from the Amazon region, reared in the laboratory." Acta Amazonica 35, no. 1 (2005): 77–84. http://dx.doi.org/10.1590/s0044-59672005000100012.

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The complete larval development of the ghost shrimp Lepidophthalmus siriboia Felder & Rodrigues, 1993 was described and illustrated in detail from specimens reared in the laboratory. Ovigerous females were collected at Canela Island in the northeastern region of the State of Pará. The larvae hatch as a prezoea, in which they persist for less than 3 hours. The larval development consists of three zoeal stages and a megalopa. The zoeal development averaged from 69 to 111 hours. The period in the megalopa stage was about 185 hours (about 8 days). The percentage of individuals succeeding in mo

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Santana, William, Fernando P. L. Marques, Adilson Fransozo, and Giovana Bertini. "Larval development of Notolopas brasiliensis Miers, 1886 (Brachyura: Majoidea: Pisidae) described from laboratory reared material and a reappraisal of the characters of Pisidae." Papéis Avulsos de Zoologia 46, no. 19 (2006): 219–32. http://dx.doi.org/10.1590/s0031-10492006001900001.

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The complete larval stages of Notolopas brasiliensis are described from laboratory reared material, with emphasis on the external morphological features of Majoidea, and compare the morphology of N. brasiliensis with other genera of Pisidae. Larval development of N. brasiliensis consists of two zoeal stages and one megalopa. The duration mean of each zoeal stage was 4.2 ± 1.0 days for Zoea I and 3.8 ± 0.7 days for Zoea II, the megalopa instar appearing 8.1 ± 0.4 days after hatching. The characters previously used to define larval forms of Pisidae are either symplesiomorphic or potentially high

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Nour, OM, C. Pansch, M. Lenz, M. Wahl, C. Clemmesen, and M. Stumpp. "Impaired larval development at low salinities could limit the spread of the non-native crab Hemigrapsus takanoi in the Baltic Sea." Aquatic Biology 30 (July 29, 2021): 85–99. http://dx.doi.org/10.3354/ab00743.

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The Asian shore crab Hemigrapsus takanoi, native to the northwest Pacific Ocean, was recently discovered in Kiel Fjord (southwestern Baltic Sea). In laboratory experiments, we tested the salinity tolerance of H. takanoi across 8 levels (0 to 35) and across 3 life history stages (larvae, juveniles and adults) to assess its potential to invade the brackish Baltic Sea. Larval development at different salinities was monitored from hatching to the megalopa stage, while survival and feeding of juveniles and adults were assessed over 17 d. Larvae of H. takanoi were able to complete their development

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Nguyen, Thanh Phuong, Tinh Em Nguyen, Thi Kim Ha Nguyen, Quoc Viet Le, and Thi Thanh Huong Do. "Effects of different temperatures on the growth and survival of mud crab (Scylla paramamosain) larvae." Can Tho University Journal of Science 13, no. 3 (2021): 9–16. http://dx.doi.org/10.22144/ctu.jen.2021.035.

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This study aimed to evaluate the effects of temperature on the growth and survival of mud crab (Scylla paramamosain) larvae in two stages including zoea-1 to megalopa (the first experiment) and megalopa to crablet-1 (the second experiment). Each experiment was conducted in a completely randomized design with four temperature levels (27, 30, 33, and 36℃) in triplicate. Stocking density of 200 ind./L for the first experiment and 4 ind./L for the second experiment. Fiberglass tanks of 500-L (containing 300-L and 250-L of 25‰ water for the first and second experiment, respectively) were used in th

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Syafaat, Muhammad Nur, Mohamad Nor Azra, Khor Waiho, et al. "A Review of the Nursery Culture of Mud Crabs, Genus Scylla: Current Progress and Future Directions." Animals 11, no. 7 (2021): 2034. http://dx.doi.org/10.3390/ani11072034.

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The nursery stages of mud crab, genus Scylla, proceed from the megalopa stage to crablet instar stages. We review the definition and several of the key stages in mud crab nursery activities. The practice of the direct stocking of megalopa into ponds is not recommended due to their sensitivity. Instead, nursery rearing is needed to grow-out mud crabs of a larger size before pond stocking. Individual nursery rearing results in a higher survival rate at the expense of growth and a more complicated maintenance process compared with communal rearing. The nursery of mud crabs can be done both indoor

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Abrunhosa, Fernando A., Darlan J. B. Simith, Carlos A. M. Palmeira, and Danielle C. B. Arruda. "Lecithotrophic behaviour in zoea and megalopa larvae of the ghost shrimp Lepidophthalmus siriboia Felder and Rodrigues, 1993 (Decapoda: Callianassidae)." Anais da Academia Brasileira de Ciências 80, no. 4 (2008): 639–46. http://dx.doi.org/10.1590/s0001-37652008000400005.

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Food supply is considered critical for a successful culturing of decapod larvae. However, some species may present yolk reserve sufficient to complete their larval development without external food supply (known as lecithotrophic larval development). In the present study, two experiments were carried out in order to verify whether the callianassid Lepidophthalmus siriboia have lecithotrophic behaviour or, if they need external food for their larval development: Experiment 1, larvae submitted to an initial feeding period and Experiment 2, larvae submitted to an initial starvation period. High s

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Indra Effendy, Indra Effendy. "Morphological Description of a Plankton-Based Megalopa Thalamita sp." journal of King Abdulaziz University Marine Sciences 31, no. 1 (2021): 13–22. http://dx.doi.org/10.4197/mar.31-1.2.

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Megalopae of a Thalamita sp. crab, collected from the Obhur Creek, Jeddah, Saudi Arabia, are morphologically described. The present specimens are compared with megalopae of two species of this genus: Thalamita

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Armendariz, Laura C. "Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae." Journal of Natural History 39, no. 22 (2005): 1981–93. https://doi.org/10.1080/00222930400025920.

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Armendariz, Laura C. (2005): Redescription of the megalopa of the fiddler crab Uca uruguayensis (Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae. Journal of Natural History 39 (22): 1981-1993, DOI: 10.1080/00222930400025920, URL: http://dx.doi.org/10.1080/00222930400025920

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Guerao, Guillermo, Pere Abelló, and Antonina Dos Santos. "Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations." Journal of Natural History 40, no. 32-34 (2006): 1851–66. https://doi.org/10.1080/00222930601046584.

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Guerao, Guillermo, Abelló, Pere, Santos, Antonina Dos (2006): Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations. Journal of Natural History 40 (32-34): 1851-1866, DOI: 10.1080/00222930601046584, URL: http://dx.doi.org/10.1080/00222930601046584

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Cottens, K. F., U. A. T. Silva, R. Ventura, F. M. Ramos, and A. Ostrensky. "Cultivo de larvas de Ucides cordatus (LINNAEU, 1763) sob diferentes intensidades luminosas." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 66, no. 5 (2014): 1464–70. http://dx.doi.org/10.1590/1678-6675.

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O caranguejo-uçá, Ucides cordatus,é uma espécie típica dos manguezais brasileiros e tem grande importância econômica para as populações litorâneas tradicionais. O presente trabalho investigou a influência da intensidade luminosa sobre a sobrevivência e a taxa de desenvolvimento larval de U. cordatus. Três intensidades luminosas foram avaliadas: claro - 710 lux, penumbra - 210 lux e escuro - 1 lux, em duas condições de cultivo, individual e coletivo. Houve diferenças significativas entre as taxas de sobrevivência das larvas zoea e as três intensidades luminosas avaliadas (p<0,05). As maiores

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Abrunhosa, Fernando, Marlon Melo, Jô de Farias Lima, and Jacqueline Abrunhosa. "Developmental morphology of mouthparts and foregut of the larvae and postlarvae of Lepidophthalmus siriboia Felder & Rodrigues, 1993 (Decapoda: Callianassidae)." Acta Amazonica 36, no. 3 (2006): 335–42. http://dx.doi.org/10.1590/s0044-59672006000300008.

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In this study, the gross morphology of the mouthparts and foregut of the ghost shrimp Lepidophthalmus siriboia were investigated from larvae and postlarvae reared in the laboratory. The mouthparts (maxillae and maxillipeds) of the zoeae have a reduced number of setae and spines (or is absent in some individuals), and the foregut, under developed, have few minute setae in the cardiac and pyloric chambers. In contrast, after the metamorphosis into megalopa stage, all feeding appendages have many setae and, the foregut shows a well-developed gastric mill with strong lateral teeth. In the juvenile

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45

Sankolli, K. N., and Shakuntala Shenoy. "Larval Development of the Hermit Crab Diogenes Miles (Herbst, 1791) (Decapoda, Anomura, Diogenidae) in the Laboratory." Crustaceana 65, no. 2 (1993): 253–64. http://dx.doi.org/10.1163/156854093x00595.

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AbstractHermit crabs are the commonest intertidal anomuran crustaceans. Diogenes miles (Herbst) is an inhabitant of surf-beaten sandy shores along coasts of peninsular India. This species is outstanding among other diogenid hermit crabs in having, unlike others, an extremely flat and broad body well adapted for its occurrence in long, narrow-mouthed gastropod shells mostly of Oliva and to lesser extent Gypraea and Conus. During the present study it was observed that, contrary to what was expected, D. miles docs not breed throughout the year but appears to have its breeding season restricted to

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Pohle, Gerhard W. "Larval development of Canadian Atlantic oregoniid crabs (Brachyura: Majidae), with emphasis on Hyas coarctatus alutaceus Brandt, 1851, and a comparison with Atlantic and Pacific conspecifics." Canadian Journal of Zoology 69, no. 11 (1991): 2717–37. http://dx.doi.org/10.1139/z91-384.

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Larval development of Hyas coarctatus alutaceus Brandt, 1851, consisting of two zoeal stages followed by a megalopa, is described for the first time from larvae of known parentage. Mean duration of the first and second zoeal stages was 41 and 30 days at ambient temperature (3–12 °C) and 30 and 36 days at 9 °C, respectively. First megalopae appeared after 69 and 62 days post-hatching at ambient temperature and 9 °C, respectively. For comparison, all larval stages of Hyas araneus, Hyas coarctatus coarctatus, and Chionoecetes opilio were also cultured from local populations. Zoeae of all these sp

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Pires, Marcus Alexandre Borges. "DESENVOLVIMENTO LARVAL DO CARANGUEJO VIOLINISTA MINUCA RAPAX (OCYPODIDAE: GELASIMINAE) (SMITH, 1870), DA REGIÃO AMAZÔNICA, CULTIVADO EM CONDIÇÕES DE LABORATÓRIO." Revista ft 29, no. 146 (2025): 10–11. https://doi.org/10.69849/revistaft/cs10202505302310.

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In the present study, we describe and illustrate in detail the complete larval development of the neotropical mangrove fiddler crab Minuca rapax, cultured under laboratory conditions. Larvae were obtained from an egg-bearing female that was collected in the mangroves of the Caeté River estuary, Pará State (North Brazil). After hatching, the larvae were cultured in 250 ml plastic vials (at a density of ca. 10 larvae per vial) at an ambient temperature of 26.7 ± 1.6 °C, salinity 30, pH 8.1 ± 1.0, with photoperiod regime (12h light/ 12h dark cycle) and without aeration in the culture medium. Roti

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Rhyne, Andrew L., Yoshihisa Fujita, and Ricardo Calado. "Larval development and first crab of Mithraculus sculptus (Decapoda: Brachyura: Majoidea: Mithracidae) described from laboratory-reared material." Journal of the Marine Biological Association of the United Kingdom 86, no. 5 (2006): 1133–47. http://dx.doi.org/10.1017/s0025315406014111.

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The present work describes the complete larval development of Mithraculus sculptus (two zoeal stages, the megalopa) and the first crab instar from laboratory cultured material. The larval morphology is compared with other descriptions currently available for the Mithrax–Mithraculus complex: Mithraculus coryphe, M. forceps, Mithrax hispidus, M. pleuracanthus, M. spinosissimus and M. verrucosus. Although the different species of the Mithrax–Mithraculus complex display uniform morphological characters, the first zoeal stage of M. sculptus differs from other species in the setal meristics of the c

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Kornienko, Elena S., Darya D. Golubinskaya, Olga M. Korn, and Svetlana N. Sharina. "The complete description of larval stages of the lobster shrimpLeonardsaxius amurensis(Kobjakova, 1937) (Decapoda: Axiidea: Axiidae) identified by DNA barcoding." Journal of the Marine Biological Association of the United Kingdom 98, no. 6 (2017): 1435–53. http://dx.doi.org/10.1017/s0025315417000510.

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The complete larval development of the lobster shrimpLeonardsaxius amurensis(Kobjakova, 1937) (Decapoda: Axiidea: Axiidae) is described and illustrated for the first time. The first zoeae of this species were collected from the plankton samples and reared in the laboratory before moulting to the megalopa. A molecular genetic analysis based on comparison of partial mitochondrial COI, 12S rDNA and 16S rDNA sequence data confirmed the identity of axiid larvae found in the plankton andL. amurensisadults collected in the same area. The larval development ofL. amurensisincludes five zoeal stages and

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Yamamoto, T., T. Yamada, H. Fujimoto, and K. Hamasaki. "Food consumption pattern in the snow crab Chionoecetes opilio (Fabricius, 1788) (Decapoda, Majoidea) megalopae under laboratory conditions." Crustaceana 88, no. 7-8 (2015): 881–91. http://dx.doi.org/10.1163/15685403-00003452.

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The food consumption pattern in megalopae of the snow crab Chionoecetes opilio (Fabricius, 1788) was investigated in the laboratory. Ten megalopae were individually cultured and given an excess of Artemia nauplii each day. All megalopae moulted into first-instar crabs 28-34 days after metamorphosis. The mean total number and total weight of Artemia consumed during the megalopal stage were 1920 individuals and 5.2 mg, respectively. Hence, the food requirement of snow crab megalopae was estimated as ∼190% of the dry body weight of the first-instar crab. Initially, the number of Artemia consumed

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