Relevant bibliographies by topics / Maturation and Spawning

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
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Academic literature on the topic 'Maturation and Spawning'

Author: Grafiati
Published: 5 June 2025
Last updated: 12 July 2025

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Journal articles on the topic "Maturation and Spawning"

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Weir, Laura K., Jeffrey A. Hutchings, Ian A. Fleming, and Sigurd Einum. "Spawning behaviour and success of mature male Atlantic salmon (Salmo salar) parr of farmed and wild origin." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 5 (2005): 1153–60. http://dx.doi.org/10.1139/f05-032.

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We examined genetic differences in the reproduction of an alternative maturation phenotype in Atlantic salmon (Salmo salar) by comparing the spawning behaviour and success among farmed, first-generation hybrid, and wild mature male parr raised in similar environments. Parr competed for spawning opportunities in the presence of either wild or farmed large males. There were no consistent differences among groups in aggression; however, there were differences in spawning participation with respect to large male origin and among parr types. There was a strong negative temporal effect on mature male parr spawning participation that differed by parr type; wild and farmed parr were most likely to participate in early spawnings, with hybrids being the most likely to participate in late spawnings. Overall, parr were also less likely to participate in spawnings involving large farmed males. Variance in reproductive success was higher among parr than among large males. Our results are consistent with the hypothesis that there are genetically based behavioural differences among mature male parr of farmed and wild origin that may potentially lead to differences in reproductive success.
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Williams, James R., and Russell C. Babcock. "Comparison of multiple techniques to evaluate reproductive variability in a marine bivalve: application to the scallop Pecten novaezelandiae." Marine and Freshwater Research 55, no. 5 (2004): 457. http://dx.doi.org/10.1071/mf03200.

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Reproduction and spawning of the scallop Pecten novaezelandiae were monitored at four sites in the Hauraki Gulf, New Zealand, from July 2000 to July 2001. A visual grading system based on the macroscopic appearance of the gonad was developed and tested, and changes in visual grade, quantitative histology, and standardised gonad mass were used to describe seasonal and spatial patterns in gametogenesis and spawning. Visual grade was significantly correlated with histological and gonad mass data (r 2 = 0.74–0.87) and validated as an accurate method for measuring reproduction in P. novaezelandiae. Visual grading facilitates rapid assessment of reproductive condition and can be conducted non-destructively, thus providing a tool allowing long-term studies of individual spawning behavior in relation to environmental signals. Scallops exhibited episodic spawning, with spawning events detected in spring, summer, autumn, and even early winter. Gonad recovery and subsequent gamete development and maturation were apparent between spawnings. Within-season variability in gonad size and condition could be the result of multiple (serial) spawnings during a season. The timing of spawning varied among populations, probably reflecting differences in environmental conditions that influenced reproduction. However, the largest spawning events occurred at all sites in early summer (December/January), coincident with wind-driven upwelling conditions.
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Carscadden, J., B. S. Nakashima, and K. T. Frank. "Effects of fish length and temperature on the timing of peak spawning in capelin (Mallotus villosus)." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 4 (1997): 781–87. http://dx.doi.org/10.1139/f96-331.

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Some characteristics of Newfoundland capelin (Mallotus villosus) changed during 1991-1994. Peak spawning times were later than most years in the 1980s and fish were smaller. These changes occurred during a period of below-normal sea temperatures. We tested the effects of sea temperatures during maturation and mean size of mature fish on peak spawning times using regression analysis and found significant negative relationships for both independent variables. Results of a stepwise regression showed that fish length and sea temperature during maturation were equally important and together explained about 80% of the spawning time variation. We suggest that maturation and migration are closely linked to seasonal warming and the zooplankton cycle. Given the high spawning mortality of capelin, it seems that this linkage favours maximum gonad production rather than adult survival. Knowledge of spring water temperatures would permit some prediction of capelin spawning time. However, the data series for mean length used in this analysis is not useful for predicting spawning time.
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Rajasilta, Marjut. "Relationship between Food, Fat, Sexual Maturation, and Spawning Time of Baltic Herring (Clupea harengus membras) in the Archipelago Sea." Canadian Journal of Fisheries and Aquatic Sciences 49, no. 4 (1992): 644–54. http://dx.doi.org/10.1139/f92-073.

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The effect of nutritional status on gonad maturation and timing of spawning was examined in the Baltic herring (Clupea harengus membras) in the Archipelago Sea. Fish were collected from overwintering areas in December and from the spawning grounds in May–July. Muscle fat content, amount of mesenteric fat, and condition factor were used as indicators of nutritional status of fish. In winter, fish were highly variable with substantial individual variation in nutritional status, gonad stage, gonad weight, and gonadosomatic index (GSI). Gonad weight was related to fat content, suggesting a close relationship with fish nutritional status and maturation rate. Spawning fish were separable into early and late spawners according to fat content, gonad weight, and GSI but not according to length. The spawning shoals consisted of mixtures of fish of all sizes. I concluded that in the study area, individual maturation cycles vary and timing of spawning is primarily determined by the feeding conditions prior to spawning.
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Ware, D. M., and R. W. Tanasichuk. "Biological Basis of Maturation and Spawning Waves in Pacific Herring (Clupea harengus pallasi)." Canadian Journal of Fisheries and Aquatic Sciences 46, no. 10 (1989): 1776–84. http://dx.doi.org/10.1139/f89-225.

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Maturation rates (measured as the change in the gonosomatic index (GSI) with time) over the last month of the annual maturation cycle were estimated for male and female herring in British Columbia, between 1982–87. The data were analyzed to determine interannual and interregional differences in the maturation rate and its influence on spawning time. The data also indicated that in some areas herring spawned in discrete waves — the largest fish tended to spawn first and the smaller fish in subsequent waves. Each spawning wave lasted about 5–6 d and the interwave interval varied from 8–26 d in the Strait of Georgia. General equations were developed to describe gonadal growth over the entire maturation cycle. These equations accounted for the observed differences in: (1) the maturation rates between the sexes (males initially mature faster), (2) the interregional and interannual variation in the timing of spawning (herring tend to spawn later at higher latitudes, and earlier than normal when its warmer), and (3) provide an explanation for spawning waves. All of these phenomena derive from the fact that the instantaneous rate at which the gonad grows during the maturation cycle in both sexes depends on the weight of the fish, and the daily sea temperature.
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Damme, Cindy J. G. van, Mark Dickey-Collas, Adriaan D. Rijnsdorp, and Olav S. Kjesbu. "Fecundity, atresia, and spawning strategies of Atlantic herring (Clupea harengus)." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 12 (2009): 2130–41. http://dx.doi.org/10.1139/f09-153.

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Atlantic herring ( Clupea harengus ) have contrasting spawning strategies, with apparently genetically similar fish “choosing” different spawning seasons, different egg sizes, and different spawning areas. In the North Sea, both autumn- and winter-spawning herring share the same summer feeding area but have different spawning areas. Females of both spawning types start their oocyte development in April–May. Oocyte development is influenced by the body energy content; during the maturation cycle, fecundity is down-regulated through atresia in relation to the actual body condition. Hence, fecundity estimates must account for the relative time of sampling. The down-regulation over the whole maturation period is approximately 20% in autumn- and 50% in winter-spawning herring. The development of the oocytes is the same for both spawning strategies until autumn when autumn spawners spawn a larger number of small eggs. In winter spawners, oocyte development and down-regulation of fecundity continues, resulting in larger eggs and lower number spawned. In theory, autumn and winter spawners could therefore switch spawning strategies, indicating a high level of reproductive plasticity.
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Davison, Raziel J., and William H. Satterthwaite. "Life history effects on hatchery contributions to ocean harvest and natural-area spawning." Canadian Journal of Fisheries and Aquatic Sciences 74, no. 10 (2017): 1575–87. http://dx.doi.org/10.1139/cjfas-2016-0457.

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Hatcheries can support salmon fisheries but also impact natural populations. We model the proportional hatchery contributions to ocean catch, natural-area spawning, and egg production based on hatchery production, maturation, fecundity, and straying. We develop indices of hatchery-origin catch per stray spawner measuring the trade-off between supplementing harvest and limiting natural-area impacts; higher values indicate success in increasing hatchery ocean harvest contributions relative to strays spawning in natural areas. Hatchery fish maturing early lowers catch per stray (and proportion hatchery-origin catch) by shifting the age distributions of both catch and spawners toward younger ages. Age-dependent fecundity may complicate predicted effects of changing maturation schedules. Increased straying does not affect catch but increases hatchery-origin spawning and decreases catch per stray. Differences in hatchery production affect hatchery contributions to both catch and spawning, exacerbating the trade-off between these conflicting goals but with no net effect on catch per stray. Fishery intensity magnifies the effects of accelerated hatchery fish maturation by reducing spawning contributions of older fish, with contrasting effects depending on whether hatchery fish mature early versus late.
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Beverton, Raymond J. H., Arvid Hylen, Ole-Johan Østvedt, John Alvsvaag, and Terence C. Iles. "Growth, maturation, and longevity of maturation cohorts of Norwegian spring-spawning herring." ICES Journal of Marine Science 61, no. 2 (2004): 165–75. http://dx.doi.org/10.1016/j.icesjms.2004.01.001.

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Abstract In 1907, the Bergen Institute of Marine Research started regular sampling of scales and lengths from landings of mature Norwegian spring-spawning herring. The actual age of each fish when caught was recorded, and from the early 1920s also the age at which it spawned for the first time. The present analyses concern biological samples secured during the fishing seasons 1940–1964. Herring in this stock do not all reach maturity at the same age. A small proportion of any one year class matures at 3 years. The majority matures from the age of 4–7 years, and a small proportion of some year classes at 8 and even 9 years of age. Subsequent age composition and growth of each maturation cohort were followed throughout mature life after spawning for the first time. The maximum age was found to increase with age at maturation, rising to an asymptote of about 22 years. The von Bertalanffy parameter L∞ shows an increasing trend with age at maturation, while K decreases. There is no strict length threshold at maturation and the curve joining the length at which each maturation cohort reaches maturity is less steep than the growth curve itself over the range of maturation ages. The data suggest that fish in this stock spawn, on average, eight times during a period of their life history in which the mortality rate is independent of age. After these eight spawnings, at an age referred to in this paper as the hinge age, the mortality rate increases sharply. Thus, the adult life is divided into two phases, called here pre-senescent and senescent. The total mortality rates in the pre-senescent phase are relatively stable for all maturation cohorts 3–9, but there is some evidence of a trend towards higher mortality rates during the senescent phase for the youngest maturing fish. This trend is caused mainly by a reduced natural mortality in the fish that mature when older. These findings have interesting demographic implications. Additional mortality due to fishing will change the relative contribution of young and old maturation cohorts in the senescent phase, thus making it appear that natural mortality is dependent on the intensity of fishing. Consequently, for stock assessment, analysis on a cohort basis seems advisable.
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Nikandrov, V. Ya, N. I. Shindavina, A. A. Zinchenko, and J. N. Lukina. "REPRODUCTIVE POTENTIAL OF THE RAINBOW TROUT <i>ONCORHYNCHUS MYKISS</i> AND FEATURES OF ITS MANIFESTATION." Problems of Fisheries 25, no. 2 (2024): 105–10. http://dx.doi.org/10.36038/0234-2774-2024-25-2-105-110.

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The paper deals with reproduction potential features (including seasonal occurrence and frequency of female maturation during the year) of rainbow trout under fish farming. Several hypotheses explaining biannual spawning phenomenon are discussed; farming conditions (i.e. photoperiod duration and temperature) and long-term selection for early maturation are among of them. On the basis of fish sexual cycle evolution analysis, the authors suggest that the significant potential of genetic variability of rainbow trout reproductive features and genetic determination of some individuals to its appearance can be viewed as the reason of biannual spawning. Uncovering of theoretical backgrounds of multiple maturation of rainbow trout during the year can serve as a basis for practical use of biannual spawning phenomenon in fish farming.
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Shinozaki-Mendes, RA, J. Santander-Neto, JRF Silva, and FHV Hazin. "Gonad maturation of Haemulon plumieri (Teleostei: Haemulidae) in Ceará state, Northeastern Brazil." Brazilian Journal of Biology 73, no. 2 (2013): 383–90. http://dx.doi.org/10.1590/s1519-69842013000200019.

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To elucidate the reproductive cycle of any animal, it is first necessary to understand the development of the germ cells and how this process occurs throughout the reproductive tract. Thus, the aim of the present study was to understand the oogenesis and spermatogenesis, as well as the ovarian and testis maturation and type of spawning, of Haemulon plumieri. A total of 119 females and 136 males were analysed. Based on micro and macroscopic characteristics of gonads, the following stages of maturation for females were determined: immature, maturing, ripe, partially spawning, spawning and resting. For males, only the stages immature, maturing, ripe and spent were observed. We can conclude that the ovarian development occurs cyclically, in which the female can spawn more than two times during the reproductive season with the spawning “synchronous in more than two groups”. Since males do not present the “rest” stage after copulation, the maturation process is continuous.
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Dissertations / Theses on the topic "Maturation and Spawning"

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Maki, Kristin L. "Maturation and Repeat Spawning by American Shad in the York River, Virginia." W&M ScholarWorks, 2000. https://scholarworks.wm.edu/etd/1539617760.

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Blythe, William G. "Induced maturation and spawning of striped bass, Morone saxatilis, exposed to 6-, 9-, and 12-month photothermal regimes." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/42948.

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This thesis was partitioned into three studies. In the first study, striped bass, Morone saxatilis, (n = 16) were monitored over a 13 month period to examine the efficacy of ultrasound to determine sex and to monitor sexual maturation. Four observers reviewed all ultrasound images (n = 208) of striped bass and were able to sex male and female striped bass with 99 and 95% accuracy, respectively throughout an annual reproductive cycle. Egg diameter was highly correlated with average (r = 0.89) and maximum (r=0.92) ovarian diameter as measured by ultrasound. Spenniating males exhibited larger maximum testicular diameters (23.5 mm) than non-spermiating males (13.1 mm). Fully mature female and male striped bass exhibited maximum ovarian diameters > 30 mm and testicular diameters > 20 mm as measured by ultrasound. The results of this study indicate that ultrasound is an effective and non-invasive method that aquaculturists can use to quickly scan, sex, and assess the sexual maturation of adult male and female striped bass year-round. In the second study, photothennal manipulation was used to induce spawning out-of season and to increase the frequency of spawning in striped bass, Morone saxatilis. Forty adult striped bass, held in five environmental chambers, were exposed to compressed 6- and 9- month cycles and a 12-month reference cycle. Maximum egg diameters increased with cycle length, averaging 845 urn, 946 urn, and 1,073 um for females held on the 6-, 9-, and 12-month cycles,respectively. Females held on the 6-month cycle had smaller ovarian diameters (19.6 mm) than those held on the 9-month (27.4 mm) and 12-month (24.5 mm) cycles. Ovary diameter was highly correlated with egg diameter (r = 0.91). Spawning success (percent of females spawning) increased with cycle length, averaging 38%, 86%, and 100% in the 6-, 9-, and 12-month cycles, respectively. However, no differences in latent times, fecundity, or fertility were detected between cycles or between tank-spawned and strip-spawned females. Males held on the 6-month cycle had smaller testicular diameters (16.2 mm) than those held on 9-month (23.6 mm) and 12-month (19.2 mm) cycles. Testicular diameter ofspenniating males (15.7 mm) was significantly larger than that ofnon-spenniating males (6.9 rnrn) in all cycles. Mortality increased with cycle length, averaging 28%, 38%, and 88% for fish held on the 6-, 9-, and 12-month cycles, respectively. Maturation and spawning were advanced by five and three months for fish held in the 6- and 9-month cycles, respectively when compared to a natural 12-month reference cycle. Fish held on the 6-month cycle matured twice within a year. However, the relatively low number of spawning females and diminished egg, ovarian, and testicular diameter of fish held on the 6-month cycle suggest that an abbreviated cycle length « 9 months) may inhibit maturation and constrain spawning success.<br>Master of Science
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Tate, Andrew E. "Maturation, spawning and fertility of hybrid striped bass (Morone chrysops x Morone saxatilis) exposed to 6- and 9-month photothermal cycles." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02132009-170956/.

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LAVANDER, Henrique David. "Manutenção e reprodução de Anomalocardia brasiliana (Bivalvia: Veneridae) em condições laboratoriais." Universidade Federal Rural de Pernambuco, 2013. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6321.

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Submitted by (edna.saturno@ufrpe.br) on 2017-02-13T14:28:34Z No. of bitstreams: 1 Henrique David Lavander.pdf: 512699 bytes, checksum: 0cf7077c9553bc2674a27d16ccb517bc (MD5)<br>Made available in DSpace on 2017-02-13T14:28:34Z (GMT). No. of bitstreams: 1 Henrique David Lavander.pdf: 512699 bytes, checksum: 0cf7077c9553bc2674a27d16ccb517bc (MD5) Previous issue date: 2013-02-08<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The Veneridae family it´s among the most commercially harvested shellfish by fisheries and aquaculture in the world, the sediment clam Anomalocardia brasiliana occurs throughout the Brazilian coast and has great importance for artisanal fisheries. In recent years sparked national interest by cultivation of mollusks. This study aimed at the first article the filtration and ingestion rate of A. brasiliana under different conditions of light, temperature and salinity on laboratory conditions in three separate experiments, analyzed by factorial analysis of variance, followed by Duncan test, with significance level of P <0.05. The best results for the filtration and ingestion rates were obtained in the absence of light at room temperature of 27ºC, and salinity of 30gL-1. The second article aimed to evaluate the reproduction of the species in laboratory comparing the induction method of temperature variation, addition of microalgae and gametes into the water with the method of natural spawning, without application of stimuli. The results showed that the gonads were well developed before and after the period of maturation, considered mature. Spawning occurred in both treatments, but no significant difference according to the t test with significant differences at p <0.05 were found. But the best results were obtained at natural spawning during the handling of the shellfish in the maturation step or after the experiments. In this method obtained over 900 thousand eggs. These results can help to improve conditions for breeding and obtaining larvae in laboratory, and thus reduce production costs and improve technology to species.<br>A família Veneridae está entre os moluscos bivalves mais explorados comercialmente pela pesca e aquicultura no mundo, o marisco de sedimento Anomalocardia brasiliana ocorre em toda costa brasileira e apresenta grande importância para pesca artesanal. Nos últimos anos despertou interesse na malacocultura nacional. O presente estudo analisou no seu primeiro artigo a taxa de filtração e ingestão da A. brasiliana frente a diferentes condições de luz, temperatura e salinidade em condições de laboratório em três experimentos distintos, submetidos a Análise de Variância Fatorial, seguido pelo Teste de Duncan, com nível de significância p<0,05. Os melhores resultados referentes às taxas de filtração e ingestão foram obtidos na ausência de luz, em temperatura ambiente de 27ºC, e salinidade de 30 g.L-1. O segundo artigo teve como objetivo avaliar a reprodução da espécie em laboratório comparando o método de indução por variação da temperatura, adição de microalgas e gametas na água por desova natural, sem aplicação de estímulos. Os resultados demonstraram que as gônadas apresentavam-se bem desenvolvidas antes e após o período de maturação, consideradas maduras. A desova ocorreu nos dois tratamentos, mas não houve diferença significativa de acordo com o Teste t com diferenças significativas quando p < 0,05. Os melhores resultados foram obtidos em desovas naturais, durante o manejo dos mariscos na etapa de maturação ou após os experimentos, neste método se obteve mais de 900 mil ovos. Esses resultados podem contibuir para melhorar as condições dos reprodutores e produção de larvas em laboratório, e com isso diminuir os custos de produção e melhorar a tecnologia para espécie.
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Nair, Manoj R. "Studies on induced maturation, spawning and larval settlement in green mussel Perna viridis (Linnaeus, 1758)." Thesis, 2001. http://eprints.cmfri.org.in/7136/1/TH-92_Man.pdf.

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In the green mussel Perna viridis (Linnaeus, 1758), studies were undertaken on the induced maturation, spawning, larval rearing and settlement. Perna viridis broodstock could be conditioned or induced to mature out of the spawning season by maintaining them at 23 ± 1 • C, at > 30 ppt salinity, pH 7.5 - 8.2 and fed with Chaetoceros calcitrans at a cell concentration of lx 10 5 ml-1 fortified with 700 I.U. cod liver oil @ 1 I animal-1day-1 in two installments for 15 and 32 days respectively. All increase of 5 • C form the ambient water temperature at a salinity> 25 ppt and pH 7 - 8.2 with an addition of male or female gametes was able to induce 100 % spawning in 1 -2 hours in P. viridis. No sex wise pattem was observed. None of the commonly used chemicals like Hydrogen peroxide or Serotonin was able to elicit a full spawning response. Studies on the effect of Physico - chemical parameters for larval rearing of P. viridis showed that a temperature of 29 • C - 31 • C at high salinity > 30 ppt with 50 ppm Chloramphenicol antibiotic at pH 8.2, with moderate aeration and fed with lsochrysis galbana, as the best for optimum growth, percentage survival and settlement of spat. Settlement preference indicated clearly that primary settling larvae required filamentous substrates and among these byssus threads was the best substrate even though presence of adult mussels significantly attracted more mussels.than byssal threads. High temperature 31• C, moderate aeration, salinity of 25 - 38 ppt, pH 7 - 8 was optimum for larval settlement. Among the various chemicals tried L-DOPA gave the best results with 100 % settlement observed in 5 hours at 2.5 x 10 -7 M. Remote setting was also successfully done with larvae transported in ambient moist condition. A 24 hour transportation period did not significantly affect the percentage of P. viridis larval survival or settlement
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Bushnell, Megan. "Reproduction of Zebrasoma flavescens : oocyte maturation, spawning patterns, and an estimate of reproductive potential for female yellow tang in Hawaiʻi". Thesis, 2007. http://hdl.handle.net/10125/20928.

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Books on the topic "Maturation and Spawning"

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Laboratories, Argent, ed. Report on endocrine techniques in aquaculture: Induced spawning, maturation and sex reversal. Argent Laboratories Press, 1997.

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United States-Japan Cooperative Program in Natural Resources. Aquaculture Panel. Spawning and maturation of aquaculture species: Kihei, Hawaii, U.S.A, 10-12 November 1999. University of Hawaii Sea Grant College Program, 2000.

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Book chapters on the topic "Maturation and Spawning"

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Jonsson, Bror, and Nina Jonsson. "Maturation and Spawning." In Ecology of Atlantic Salmon and Brown Trout. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1189-1_7.

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Palstra, Arjan, and Guido van den Thillart. "Artificial Maturation and Reproduction of the European Eel." In Spawning Migration of the European Eel. Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-9095-0_13.

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Mylonas, Constantinos C., and Yonathan Zohar. "Promoting oocyte maturation, ovulation and spawning in farmed fish." In The Fish Oocyte. Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6235-3_15.

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Palstra, Arjan, Vincent van Ginneken, and Guido van den Thillart. "Effects of Swimming on Silvering and Maturation of the European Eel, Anguilla anguilla L." In Spawning Migration of the European Eel. Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-9095-0_10.

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Aroua, Salima, Karine Rousseau, Monika Schmitz, Ching-Fong Chang, and Sylvie Dufour. "The Gonadoliberin(S)-Gonadotropin(S) Axis in the Eel: Expression and Regulation Under Induced Maturation and Sex Steroid Feedbacks." In Spawning Migration of the European Eel. Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-9095-0_11.

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Kumar, Rajesh, Dushyant Kumar Damle, and Bindu R. Pillai. "Hormonal Influence on Induced Maturation and Spawning in Striped Murrel, Channa striata." In Recent updates in molecular Endocrinology and Reproductive Physiology of Fish. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8369-8_5.

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Matsuyama, Michiya, Sumito Morita, Takao Nasu, and Masaaki Kashiwagi. "Daily spawning and development of sensitivity to gonadotropin and maturation-inducing steroid in the oocytes of the bambooleaf wrasse, Pseudolabrus japonicus." In Fish biology in Japan: an anthology in honour of Hiroya Kawanabe. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9016-7_22.

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Jayabalan, Nachiappan, Shama Zaki, Abdulaziz Al-Marzouqi, and Lubna Al-Kharusi. "Maturation, Spawning, and Feeding Habits of the Indian Mackerel Rastrelliger kanagurta (Cuvier, 1817) from the Sea of Oman off the Sohar Coast, Sultanate of Oman." In The Arabian Seas: Biodiversity, Environmental Challenges and Conservation Measures. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51506-5_19.

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Chattopadhyay, Nihar Ranjan. "Reproductive Cycle, Maturation, and Spawning." In Induced Fish Breeding. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-801774-6.00002-x.

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Diwan, A. D. "Neuroendocrine Control of Maturation, Breeding and Spawning." In Biotechnology of Penaeid Shrimps. CRC Press, 2020. http://dx.doi.org/10.1201/9781003155966-7.

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Reports on the topic "Maturation and Spawning"

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Funk, Steffen, and Christian Möllmann. Monitoring winter spawning activity of Western Baltic cod (Gadus morhua) (2021-25), Cruise No. AL606, January 22nd – January 30th 2024, Kiel (Germany) – Kiel (Germany), Winter cod 2021-25. GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany, 2023. http://dx.doi.org/10.3289/cr_al606.

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This cruise was the fourth out of five proposed cruises in the framework of the winter cod 2021- 25 cruises of the IMF, which aim to investigate the early winter spawning activity of Western Baltic cod. For this purpose, ichthyoplankton samples and cod samples were taken on a pre-defined station grid. Cod samples were used to investigate maturity stages and condition of adult cod. Plankton samples were analysed with a focus on the occurrence of cod eggs and larvae. The data will be used to identify whether there is a shift towards earlier spawning activities of Western Baltic cod and how spawning activity differs spatially between parts of the Belt Sea. During the cruise AL606 spawning cod were found in the Kiel Bight, the Mecklenburg Bight, and the Fehmarn Belt. First analyses of BONGO-net samples revealed no occurrence of cod larvae in the sampling area during this year’s January cruise 2024. This absence of cod larvae might be a result of the relatively harsh and cold winter of 2023/24 and an associated delay in the maturation and spawning of western Baltic cod compared to the warmer previous years 2021-2023. The observation of fewer larvae of other fish species (e.g., plaice) compared to previous years supports this hypothesis. However, especially the observation of spawning and post-spawning cod in the Mecklenburg Bight during AL606 provided further evidence for the hypothesised temporal shift in spawning phenology towards an earlier onset than described in the past. (Alkor-Berichte ; AL606)
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2

Saillant, Eric, Jason Lemus, and James Franks. Culture of Lobotes surinamensis (Tripletail). Mississippi Department of Marine Resources, 2014. http://dx.doi.org/10.18785/ose.001.

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The Tripletail, Lobotes surinamensis, is a pelagic fish found in tropical and sub-tropical waters of all oceans. Tripletails are often associated with floating debris and make frequent incursions in bays and estuaries where they are targeted by recreational fishermen. In Mississippi waters the species is typically present during the late spring and summer season that also correspond to the period of sexual maturation and spawning (Brown-Peterson and Franks 2001). Tripletail is appreciated as a gamefish but is also prized for its flesh of superior quality. The fast growth rate of juveniles in captivity documented by Franks et al. (2001) and the excellent quality of Tripletail flesh both contribute to the potential of this species for marine aquaculture. In addition, the production of cultured juveniles would be precious to develop a better understanding of the biology, early life history and habitat use of Tripletail larvae and juveniles, a topic largely undocumented to date, through experimental releases and controlled studies. The culture of tripletail thus supports the Tidelands Trust Fund Program through improved conservation of natural resources, potential enhancement of fisheries productivity and potential development of a new economic activity on the Gulf coast producing tripletail via aquaculture. The Objective of this project was to initiate development of methods and techniques needed to spawn captive held tripletail broodfish and raise their offspring to evaluate their growth and development in captivity. In this report we will present the results of studies aiming to develop methods and protocols for captive spawning of tripletail and the first data obtained on the early development of tripletail larvae. A major issue that was encountered with tripletail broodstock development during the project lied in the difficulties associated with identifying the sex of adults caught in the wild and candidates for being incorporated in mating sets for spawning. This issue was addressed during the course of the project by examining the potential of a non-lethal method of hormonal sexing. The results of these preliminary investigations are presented in the third part of this report. All protocols used in the project were determined with the guidance of the Institutional Animal Care and Use Committee (IACUC) of the University of Southern Mississippi (USM IACUC protocol number 10100108).
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3

Reusch, Thorsten. Baltic Cod, Cruise No. AL594, 13 May – 27 May 2023, Kiel (Germany) – Kiel (Germany). GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany, 2024. http://dx.doi.org/10.3289/cr_al594.

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The cruise AL594 "Baltic Cod" focused on the status of the Eastern Baltic cod stock, along with its prey fields (zooplankton and pelagic fish prey) and hydrographic boundary conditions. The cruise extended a 38yr long-term data series on (eco-)system composition and functioning of the Baltic Sea, with a focus on the deeper basins. Collaborations included (i) sampling and experimentation on phytoplankton-virus and -grazer interactions (Uni HH, Dr. Luisa Listmann) (ii) cod gonad and liver sampling for fecundity and parasite studies (in collaboration with Dr. Jonna Tomkiewicz, DTU Aqua) (iii) the study of microbially mediated vitamin B1 (thiamine) dynamics in the Baltic Sea along a salinity gradient (Dr. Kristin Bergauer, GEOMAR). The cruise focused on the Bornholm Basin as most important remaining spawning area of Eastern Baltic cod, but also included the Western Baltic Sea (Kiel and Mecklenburg Bight) and the Arkona Basin. Detailed zoo- and ichthyoplankton sampling was conducted in the Western Baltic (Mecklenburg Bight, Arkona Basin) to contribute to spatially resolved recruitment data of Western Baltic cod via the “Winter cod 2021-2025” program in the BMBF-DAM funded Project SpaCeParti. Subsamples of cod (Gadus morhua), whiting, and flatfish species were taken to determine stock structure, gonadal maturation, stomach contents, and egg production (sprat and cod), and to sample tissue and otolith samples for individual-level genomic and ecological analyses (cod). Here, we present the following first results (i) cod nutritional condition is no longer deteriorating, while individual growth rates have significantly decreased in the past 29 years (ii) the size structure of the stock is still not recovering towards larger individuals, with most individuals (&gt;99%) smaller than 50 cm in length and (iii) Eastern Baltic cod shows moreover signs of recent fisheries induced evolution towards reduced growth rates that are mirrored in genomic changes. (Alkor-Berichte ; AL594)
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4

Yaron, Zvi, Abigail Elizur, Martin Schreibman, and Yonathan Zohar. Advancing Puberty in the Black Carp (Mylopharyngodon piceus) and the Striped Bass (Morone saxatilis). United States Department of Agriculture, 2000. http://dx.doi.org/10.32747/2000.7695841.bard.

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Both the genes and cDNA sequences encoding the b-subunits of black carp LH and FSH were isolated, cloned and sequenced. Sequence analysis of the bcFSHb and LHb5'flanking regions revealed that the promoter region of both genes contains canonical TATA sequences, 30 bp and 17 bp upstream of the transcription start site of FSHb and LHb genes, respectively. In addition, they include several sequences of cis-acting motifs, required for inducible and tissue-specific transcriptional regulation: the gonadotropin-specific element (GSE), GnRH responsive element (GRE), half sites of estrogen and androgen response elements, cAMP response element, and AP1. Several methods have been employed by the Israeli team to purify the recombinant b subunits (EtOH precipitation, gel filtration and lentil lectin). While the final objective to produce pure recombinantGtH subunits has not yet been achieved, we have covered much ground towards this goal. The black carp ovary showed a gradual increase in both mass and oocyte diameter. First postvitellogenic oocytes were found in 5 yr old fish. At this age, the testes already contained spermatozoa. The circulating LH levels increased from 0.5 ng/ml in 4 yr old fish to &gt;5ng/ml in 5 yr old fish. In vivo challenge experiments in black carp showed the initial LH response of the pituitary to GnRH in 4 yr old fish. The response was further augmented in 5 yr old fish. The increase in estradiol level in response to gonadotropic stimulation was first noted in 4 yr old fish but this response was much stronger in the following year. In vivo experiments on the FSHb and LHb mRNA levels in response to GnRH were carried out on common carp as a model for synchronom spawning cyprinids. These experiments showed the prevalence of FSHP in maturing fish while LHP mRNA was prevalent in mature fish, especially in females. The gonadal fat-pad was found to originate from the retroperitoneal mesoderm and not from the genital ridge, thus differing from that reported in certain amphibians This tissue possibly serves as the major source of sex steroids in the immature black carp. However, such a function is taken over by the developing gonads in 4 yr old fish. In the striped bass, we described the ontogeny of the neuro-endocrine parameters along the brain-pituitary-gonadal axis during the first four years of life, throughout gonadal development and the onset of puberty. We also described the responsiveness of the reproductive axis to long-term hormonal manipulations at various stages of gonadal development. Most males reached complete sexual maturity during the first year of life. Puberty was initiated during the third year of life in most females, but this first reproductive cycle did not lead to the acquisition of full sexual maturity. This finding indicates that more than one reproductive cycle may be required before adulthood is reached. Out of the three native GnRHs present in striped bass, only sbGnRH and cGnRH II increased concomitantly with the progress of gonadal development and the onset of puberty. This finding, together with data on GtH synthesis and release, suggests that while sbGnRH and cGnRH II may be involved in the regulation of puberty in striped bass, these neuropeptides are not limiting factors to the onset of puberty. Plasma LH levels remained low in all fish, suggesting that LH plays only a minor role in early gonadal development. This hypothesis was further supported by the finding that experimentally elevated plasma LH levels did not result in the induction of complete ovarian and testicular development. The acquisition of complete puberty in 4 yr old females was associated with a rise in the mRNA levels of all GtH subunit genes, including a 218-fold increase in the mRNA levels of bFSH. mRNA levels of the a and PLH subunits increased only 11- and 8-fold, respectively. Although data on plasma FSH levels are unavailable, the dramatic increase in bFSH mRNA suggests a pivotal role for this hormone in regulating the onset and completion of puberty in striped bass. The hormonal regulation of the onset of puberty and of GtH synthesis and release was studied by chronic administration of testosterone (T) and/or an analog of gonadotropin-releasing hormone (G). Sustained administration of T+G increased the mRNA levels of the PLH subunit to the values characteristic of sexually mature fish, and also increased the plasma levels of LH. However, these changes did not result in the acceleration of sexual maturation. The mRNA levels of the bFSH subunit were slightly stimulated, but remained about 1/10 of the values characteristic of sexually mature fish. It is concluded that the stimulation of FSH gene expression and release does not lead to the acceleration of sexual maturity, and that the failure to sufficiently stimulate the bFSH subunit gene expression may underlie the inability of the treatments to advance sexual maturity. Consequently, FSH is suggested to be the key hormone to the initiation and completion of puberty in striped bass. Future efforts to induce precocious puberty in striped bass should focus on understanding the regulation of FSH synthesis and release and on developing technologies to induce these processes. Definite formulation of hormonal manipulation to advance puberty in the striped bass and the black carp seems to be premature at this stage. However, the project has already yielded a great number of experimental tools of DNA technology, slow-release systems and endocrine information on the process of puberty. These systems and certain protocols have been already utilized successfully to advance maturation in other fish (e.g. grey mullet) and will form a base for further study on fish puberty.
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