Hormone induced spawning of red snapper, Lutjanus campechanus

Minton, Richard; Hawke, John P.; Tatum, Walter M.

doi:10.1016/0044-8486(83)90177-1

Cited by 33 publications

(27 citation statements)

References 2 publications

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“…Recognizing when ovulation occurred is one of the problems associated with strip‐spawning fish. After ovulation, snapper eggs overripen in a short period of time (Minton et al 1983), similar to striped bass, Morone saxatilis , eggs that are overripe within an hour of ovulation (Sullivan et al 1997).…”

Section: Discussionmentioning

confidence: 99%

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Induced Spawning and Egg Quality Evaluation of Red Snapper, Lutjanus campechanus

Bourque

Phelps

2007

J World Aquaculture Soc

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Brood red snapper, Lutjanus campechanus, were captured from the wild and induced to ovulate by human chorionic gonadotropin (hCG) injection; eggs and sperm were manually stripped; and the eggs were artificially fertilized. Eggs were evaluated by the following egg quality parameters: buoyancy, fertilization, egg size, and oil globule size and number. The relationship of these egg quality parameters and brood characteristics (female size, fecundity, time of year, and response time to ovulation) to 36 h posthatch larval survival was considered. Injection of wild‐caught red snapper females with 1100 IU/kg of hCG resulted in 75% of the females ovulating. The average fecundity was 343,377 ± 30,805 eggs/kg, with a mean percent fertilization of 79.0 ± 1.74%. The mean percentage of floating eggs per spawn was 91.8 ± 1.75%. Mean egg diameter for floating eggs was 778.3 ± 2.09 μm, with a mean oil globule diameter of 117.5 ± 1.53 μm. Brood‐related characteristics were a better predictor of larval survival than postovulation egg characteristics. The percentage of floating eggs in a spawn was not correlated to larval survival. Spawns with eggs having a single oil globule had a similar larval survival as those eggs where multiple globules were common. No clear relationships were found for any one factor and larval survival, but rather a combination of factors was more predictive of survival, most notably spawn date, fecundity, and response time following hCG injection.

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Section: Discussionmentioning

confidence: 99%

“…In the northern Gulf of Mexico, mature fish can be found from May through September (Bueno 2002; Woods et al 2003). Mature adults have been captured from the wild during the natural spawning season and induced to spawn (Minton et al 1983). However, larval survival is very low (Phelps 2003).…”

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confidence: 99%

Induced Spawning and Egg Quality Evaluation of Red Snapper, Lutjanus campechanus

Bourque

Phelps

2007

J World Aquaculture Soc

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“…Females were induced for gamete maturation with human chorionic gonadotropin (hCG) following a protocol based on the method developed by Minton et al (1983). Eggs were collected from each female by manual stripping at ovulation, and immediately fertilized in vitro with the sperm of one or two wild-caught males.…”

Section: Methodsmentioning

confidence: 99%

Effects of hypoxia and elevated ammonia concentration on the viability of red snapper embryos and early larvae

Bardon‐Albaret

Saillant

2016

Aquaculture

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a b s t r a c tThe effects of hypoxic conditions and elevated ammonia concentrations on the viability of embryos and newly hatched larvae of the red snapper (Lutjanus campechanus) were investigated. In all experiments, tested levels of hypoxia or ammonia concentrations were applied to embryos and unfed newly hatched larvae from three different spawns. Exposures began at 1 h post fertilization (pf) and lasted until all individuals in a group had expired. Survival rates were monitored daily in duplicates for each spawn in each treatment. Fertilized eggs exposed to 2 mg L −1 dissolved oxygen (29% saturation) showed complete mortality before hatch while 81% of embryos in control groups (N 85% saturation) hatched and subsequently maintained high survival until 5 days pf. Exposure to a moderate hypoxia (target 3 mg L −1 , 43% saturation) reduced significantly the hatch rate and subsequent survival rates; the magnitude of the difference in survival rate between control and exposed groups increased from 10% at hatch to 45% at 5 days pf. When oxygen concentration was maintained high (83% saturation) until 36 h pf and then progressively reduced to reach 3 mg L −1 at 2 days pf, the survival of exposed embryos and larvae did not differ significantly from those recorded in control groups, although potential delayed or cumulative effects of the treatment after 4 days pf could not be evaluated in this experiment. Embryos exposed to 10 mg L −1 total ammonia (TA-N), which corresponded to unionized ammonia (UIA-N) concentrations ranging between 0.307 and 0.468 mg L −1 in the conditions of the experiment, exhibited significantly reduced hatch rates and complete mortality between 3 and 4 days pf; the latter period corresponds to the onset of exogenous feeding of red snapper. In contrast, control groups (TA-N b 0.26 mg L −1 , UIA-N b 0.006 mg L −1 ) maintained high survival rates beyond 5 days pf indicating potential to successfully initiate exogenous feeding. Exposure to 1 mg L −1 TA-N (0.020 mg L −1 b UIA-N b 0.054 mg L −1 ) did not alter significantly survival with respect to control groups. Significant interactions between the spawn and the tolerance to hypoxia or elevated ammonia were detected in both experiments, indicating that variations among spawns need to be accounted for when determining safe levels for hatchery production. Statement of relevanceAchieving a reliable supply of high quality eggs and larvae is one of the main challenges of the developing marine aquaculture industry. Most studies to date have focused on maternal determinants of egg quality but the viability of embryos and newly hatched larvae can be impacted after fertilization if environmental conditions become unfavorable due to intensive hatchery conditions; this topic is poorly documented in marine fishes to date. This study provides data on the effects of two major stressors acting under high density culture (hypoxia and elevated ammonia concentration) on embryos and newly hatched larvae of the red snapper; the results highlight the importance to conside...

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“…The red snapper larvae used in this study were reared from 3 separate induced (Minton et al 1983) spawns on June 26, July 11 and July 26, 2001 of wild broodstock at the Claude Peteet Mariculture Center in Gulf Shores, Alabama. Fertilized eggs were placed into 60 l aquaria and maintained in recirculated, lightly aerated seawater (31.3) flowing into aquaria at approximately 100 ml min -1 and a temperature of 28 ± 0.5°C.…”

Section: Methodsmentioning

confidence: 99%

Development, growth, and yolk utilization of hatchery-reared red snapper Lutjanus campechanus larvae

Williams¹,

Papanikos²,

Phelps³

et al. 2004

Mar. Ecol. Prog. Ser.

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The development of yolk-sac larvae of red snapper Lutjanus campechanus from endogenous utilization of nutrient sources to the development of feeding ability is described, with the aim of better understanding the high mortalities observed at first-feeding. Larvae from several spawns were reared at a salinity of 31 and a temperature of 28°C. Yolk utilization rate, changes in body parameters and the development of morphological characters were observed. Maximum standard length (L S ) and body depth were observed concurrently with yolk-sac exhaustion at 56 h postfertilization (hpf). A decrease in L S , body width and body depth was observed following yolk-sac exhaustion. Orbit pigmentation, followed by jaw articulation, were observed at 65 hpf. Substantial cranial and body cavity development occurred in the absence of visible yolk material. Complete absence of visible yolk-sac material and less than 2% of the oil globule volume at hatching were observed at the time of development of feeding ability. This indicates an absence of a transitional feeding period and the critical nature of first-feeding in this species within controlled environments. KEY WORDS: Red snapper · Larval development · Yolk utilization · Endogenous reservesResale or republication not permitted without written consent of the publisher

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Hormone induced spawning of red snapper, Lutjanus campechanus

Cited by 33 publications

References 2 publications

Induced Spawning and Egg Quality Evaluation of Red Snapper, Lutjanus campechanus

Induced Spawning and Egg Quality Evaluation of Red Snapper, Lutjanus campechanus

Effects of hypoxia and elevated ammonia concentration on the viability of red snapper embryos and early larvae

Development, growth, and yolk utilization of hatchery-reared red snapper Lutjanus campechanus larvae

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