Effects of a major cyclone on the abundance and larval recruitment of the portunid crab<i>Scylla serrata</i>(Forskal) in the St Lucia Estuary, Natal, South Africa

Forbes, A. T.; Hay, Duncan G.

doi:10.2989/025776188784379206

Cited by 12 publications

(6 citation statements)

References 1 publication

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“…Recruitment success of mud crabs in Madagascar was estimated to be seasonal and inversely related to rainfall (Le Reste et al 1976). However, flooding associated with cyclones had little measurable effect on the recruitment of the megalopa larvae of mud crabs in the St Lucia estuary, South Africa (Forbes and Hay 1988). Under experimental conditions, adult mud crabs showed varying levels of mortality after exposure to different salinities, but did not show an ability to discriminate between salinities (Davenport and Wong 1987).…”

Section: Mud Crabsmentioning

confidence: 86%

Freshwater-flow requirements of estuarine fisheries in tropical Australia: a review of the state of knowledge and application of a suggested approach

Robins¹,

Halliday²,

Staunton-Smith³

et al. 2005

Mar. Freshwater Res.

123

115

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The freshwater-flow requirements of estuarine fisheries in tropical areas are reviewed, with reference to species important to fisheries in northern Australia. Fisheries production, in terms of catch, is often elevated during, or as a consequence of, years with higher river flow, but the causality of these relationships often remains unproven. Scientific information on the freshwater-flow requirements important to fisheries production is increasingly being sought during the planning, allocation and management of water resources within Australia and in other countries around the world. Frequently, such advice is based on the analysis of catch and freshwater flow (or rainfall), or on life-history information. Clarifying fisheries-specific goals of water management would assist in prioritising research into the freshwater-flow requirements of estuarine fisheries. A framework that integrates life-history information and correlative analyses is suggested to assist in understanding the freshwater-flow requirements of estuarine fisheries. The framework is also useful in identifying knowledge gaps and pertinent research questions. The approach is illustrated through its application to identifying key freshwater-flow events likely to be important for fisheries production in a dry tropical estuary in Queensland, Australia.

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Section: Mud Crabsmentioning

confidence: 86%

Freshwater-flow requirements of estuarine fisheries in tropical Australia: a review of the state of knowledge and application of a suggested approach

Robins¹,

Halliday²,

Staunton-Smith³

et al. 2005

Mar. Freshwater Res.

123

115

View full text Add to dashboard Cite

show abstract

“…Although cold fronts and storms have been implicated in shrimp mortality, these events are uncommon and may not be important to Louisiana white shrimp mortality during summer (Minelo and Zimmerman, 1991). The heavy precipitation associated with tropical storms, however, can reduce salinities to near zero in a few hours and flush organisms out of estuaries (Forbes and Hay, 1988).…”

Section: Environmental Predictors Of Abundancementioning

confidence: 99%

Predicting the abundance of white shrimp (Litopenaeus setiferus) from environmental parameters and previous life stages

et al. 2007

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“…Crustacean larvae can often maintain relatively normal growth and survival rates during the zoeal stages despite inadequate nutrition (Sulkin, 1978). However the physical changes associated with metamorphosis present a much greater physiological challenge (Forbes and Hay, 1988;Charmantier et al, 2002). Survival through metamorphosis is thus regarded as the ultimate criterion for evaluating diets for decapod larvae (Sulkin, 1978;Harvey, 1996;Jeffs et al, 1999;Ribeiro and Jones, 2000).…”

Section: Discussionmentioning

confidence: 99%

Optimum time for weaning South African Scylla serrata (Forsk�l) larvae from rotifers to Artemia

et al. 2005

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To determine the optimum time at which to wean Scylla serrata larvae from rotifers onto Artemia two experiments were conducted, approximately 1 month apart, using larvae from two different female crabs. In the first experiment, the larvae in three treatment groups, with nine replicates each, were fed rotifers for the first 8 days after hatching. Artemia were introduced on days after hatch (DAH) 0 -during the first zoeal instar (treatment R + A); on DAH 4 -during the second zoeal instar (treatment R4A); on DAH 8 -during the third zoeal instar (treatment R8A). In a control (ROT) larvae were fed with rotifers exclusively for 18 days until the completion of metamorphosis to megalopa. In the second experiment, the same four feeding schedules as in experiment 1 were used with an additional group of larvae (treatment AC) that were fed only on Artemia throughout the rearing period. Similar results were recorded in the two experiments. Larvae in treatments R + A and R4A performed significantly better than those in treatments R8A, ROT and AC. This was particularly evident when examining the proportion of zoeae which successfully completed metamorphosis to megalopa. Poor performance of larvae in treatments AC and ROT implied that rotifers are needed as a first food, but that rotifers alone do not fill the nutritional requirements of S. serrata larvae. Poor performance of larvae in treatment R8A suggested that the diet should be supplemented with Artemia before the end of the zoea 3 stage.Abbreviations: AC -only Artemia fed; DAH -days after hatch; LSI -larval stage index; Mmegalopa; R4A -Artemia introduced at day 4; R8A -Artemia introduced at day 8; R + AArtemia introduced at day 0; ROT -only rotifers fed; Z -zoea

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Effects of a major cyclone on the abundance and larval recruitment of the portunid crabScylla serrata(Forskal) in the St Lucia Estuary, Natal, South Africa

Cited by 12 publications

References 1 publication

Freshwater-flow requirements of estuarine fisheries in tropical Australia: a review of the state of knowledge and application of a suggested approach

Freshwater-flow requirements of estuarine fisheries in tropical Australia: a review of the state of knowledge and application of a suggested approach

Predicting the abundance of white shrimp (Litopenaeus setiferus) from environmental parameters and previous life stages

Optimum time for weaning South African Scylla serrata (Forsk�l) larvae from rotifers to Artemia

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