Reproductive Biology and the Hatchery Rearing of Tilapia Eggs and Fry

Rana, K.J.

doi:10.1007/978-94-011-9743-4_5

Cited by 54 publications

(55 citation statements)

References 79 publications

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“…These figures are slightly higher than 306-1,158 eggs per fish estimated by Rana (1988) in Oreochromis niloticus but significantly lower than the values (2,020±80-2,408±70 eggs per fish) obtained by Campos-Mendosa et al (2004) also in Oreochromis niloticus. However, the mean weight of fish used by Campos-Mendosa et al (2004) was larger than the fish used in the present study.…”

Section: Discussioncontrasting

confidence: 54%

“…However, the mean weight of fish used by Campos-Mendosa et al (2004) was larger than the fish used in the present study. It is well documented that total fecundity is related to factors such as age and size (weight) of fish (Rana, 1988;Coward and Bromage, 1999). Fish used in the present study were of the same age.…”

Section: Discussionmentioning

confidence: 91%

“…Ongoing research studies such as selective breeding, gynogenesis, androgenesis, hybridization or ploidy manipulation with tilapia are considered as a major breakthrough for the development of unique broodstock or progeny with desirable qualities to boost its production optimization. However, these research activities are constrained by inadequate supply of eggs at required time due to the asynchronous spawning behaviour of tilapia (Jalabert and Zohar, 1982;Rana, 1988;Bhujel, 2000). Thus, the importance of conditioning spawning of tilapia species for a predetermined time is worth adopting.…”

Section: Introductionmentioning

confidence: 99%

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Onumah¹,

Wessels²,

Wildenhayn³

et al. 2010

Turk. J. Fish. Aquat. Sci.

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This study investigated the effects of stocking density and photoperiod manipulation in relation to plasma estradiol-17β (E 2 ) profile to enhance spawning activity in female Nile tilapia using F1 clonal crosses. The fish were divided into experimental and control groups and subjected to a combination of stocking density and photoperiod treatments (40 kg/m 3 ; 6L:18 D, 40 kg/m 3 ; 12 L:12 D and transferred into single compartments at 12 L:12 D; 14 kg/m 3 ; 12L:12D, respectively). Blood samples were taken by caudal puncture from both experimental and control fish for estradiol profile analysis. Results showed that experimental fish exhibited significantly higher number of spawns per day, total and relative fecundity, hatching and swim-up rates (P<0.05). Regression analyses revealed a significant positive relationship between fish size (body weight), and total and relative fecundity (P<0.001). It was also revealed that E 2 levels demonstrated a pattern based on completed reproductive cycle in the experimental fish. The study therefore established that a combination of stocking density and photoperiod treatments can be adopted to manipulate the timing of spawning activity in female Nile tilapia without having adverse effect on other reproductive parameters such as egg qualities and fecundity. Findings further suggested that the effects of exogenous factors on manipulation of spawning activities of female Nile tilapia may be achieved as a result of hormonal changes including E 2 levels.

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Section: Discussioncontrasting

confidence: 54%

Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Onumah¹,

Wessels²,

Wildenhayn³

et al. 2010

Turk. J. Fish. Aquat. Sci.

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“…However, there are no literature data to enable a comparison of the oocyte sizes of the blue breams from other sites. As confirmed by other studies where the size of oocytes is positively correlated with the standard length (Rana, 1988;Reid and Chaput, 2012). In other studies, however, has been no such correlation (Linhares et al, 2014).…”

Section: Discussionsupporting

confidence: 53%

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Domagała¹,

Dziewulska²,

Kirczuk³

et al. 2016

Turk. J. Fish. Aquat. Sci.

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Histological studies of the blue bream (Ballerus ballerus L., 1758) (Actinopterygii, Cypriniformes, Cyprinidae) gonad maturation have not been conducted to date. The aim of this study was to analyse the annual gonad development cycle of the blue bream from the Oder River and Lake Dąbie in north-western Poland.The spawning period of the blue bream, a single-portion spawner, was short, lasted approximately two weeks and occurred in the first half of April in Lake Dąbie, and in the second half of April in the Oder River. The blue bream male gonads reached maturity stage IV before the winter and remained at this stage until early spring. The gonads contained cells at all spermatogenetic stages and the tubule lumen was filled with numerous spermatozoa. The males from Lake Dąbie finalized their spermatogenesis in April slightly faster than those from the Oder River. Some individuals had gonad filled with large amounts of spermatozoa even in May and June.

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“…In many teleosts, when analyzed intraspecifically, egg size and standard length are positively correlated: older and larger females tend to produce larger oocytes, increasing chances of larval survival (Rana, 1988;Kjesbu, 1989;Reid & Chaput, 2012). However, no such correlation was observed in the present study, matching reports for other species of cichlids (Rana, 1988;Coward & Bromage, 1999) and for some species of teleosts (Rodrigues & Macchi, 2010;Peressin et al, 2012).…”

Section: Discussionsupporting

confidence: 73%

Tácticas reproductivas para optimizan la supervivencia de la descendencia de Cichlasoma orientale (Perciformes: Cichlidae)

Linhares

Manna

Mazzoni

et al. 2014

RBT

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High mortality rates have been observed in Teleost during early developmental stages, as well as great variations in reproductive tactics, which are related to adaptations towards environmental conditions and ecological niches for which different species have a specific response. The objective of this study was to describe reproductive tactics related to the survival of Cichlasoma orientale offspring, including aspects of body size, parental care, fecundity, oocyte size and spawning patterns. Samples were performed monthly from August 2011 to July 2013, in lentic and lotic environments at Curu river basin, Brazilian Northeastern semiarid region. Individual behavior (n=113) was observed underwater for over 50 hours by ad libitum sampling and focal-animal sampling. Collected individuals (males n=185, females n=95) were evaluated regarding the standard length, batch fecundity, oocyte size and spawning pattern. In females with mature ovaries, oocyte groups at different developmental stages were observed, these cells were counted and measured, and fecundity was estimated by the gravimetric method. Our results showed that the species displayed biparental care behavior and, on average, males were larger than females. Based on 46 ovaries, the average batch fecundity was 2 052±849 (range: 254-3 389). Standard length and batch fecundity were positively correlated, but no correlation was found between oocyte size and standard length. The maximum diameter observed in the most developed oocytes was 1.8mm. The observed distribution of oocyte size classes indicated synchronous oocyte development in three groups: previtellogenic, vitellogenic and mature, showing that C. orientale is a multiple spawner. Differences in the amount of oocytes among the three groups were observed, with the most developed group showing the smallest number of oocytes. The combination of low fecundity and large egg size is characteristic of demersal spawners due to a greater environmental stability. Multiple spawning increases chances of survival mainly because of increased fecundity per reproductive season, and the reduced competition among the offspring. We concluded that C. orientale makes a heavy investment in larval survival in detriment of the offspring number. Survival is favored by the large size of oocytes, large yolk reserve, biparental care and multiple spawning pattern. Rev Teleosts make large investments in reproduction (Duarte, & Alcaraz, 1989) due to high mortality rates in early stages of life (McGurk, 1986). Offspring survival is safeguarded thanks to a range of reproductive tactics involving fecundity, egg size, spawning patterns and parental care, depending on environmental conditions and ecological niche (Winemiller, 1989;Murua, & Saborido-Rey, 2003).Fecundity plays an important role in recruitment (Rickman, Dulvy, Jennings & Reynolds, 2000) and is regulated by environmental conditions, food availability, predation and genetic factors (Kjesbu, Hunter, Witthames, 2003;Ganias, 2013). Teleosts fecundity may be determinate o...

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Reproductive Biology and the Hatchery Rearing of Tilapia Eggs and Fry

Cited by 54 publications

References 79 publications

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Tácticas reproductivas para optimizan la supervivencia de la descendencia de Cichlasoma orientale (Perciformes: Cichlidae)

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