Water Temperature and the 1987 Fish Kill at Lake St Lucia on the South Eastern Coast of Africa

Cyrus, D. P.; McLean, S. J.

doi:10.1080/10183469.1996.9631377

Cited by 22 publications

(14 citation statements)

References 3 publications

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“…The diversity, distribution, abundance and composition of fishery resources are linked with favourable environmental parameters such as pH, temperature, salinity and dissolved oxygen in estuarine and coastal waters elsewhere (Cyrus & Mclean 1996;Blaber 2000;Chowdhury et al 2010). Most of the hydrobiological factors in relation to seasonality were found to be significantly different.…”

Section: Discussionmentioning

confidence: 97%

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Hoque

Kamal

Idris

et al. 2015

Marine Biology Research

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This study was carried out to assess the fishery resources of the Sibuti River estuary, Sarawak, Malaysia. Data were collected from the study area for a period of one year in different seasons. The estuary is relatively species-rich and a total of 4675 individuals of 32 families from 60 species of fish (55), crab (four) and shrimp (one) were collected. Coilia dussumieri was the dominant species (22.63%) followed by Nemapteryx caelata (11.85%), Otolithes ruber (7.85%) and Ilisha elongata (5.80%). Marked seasonal variations were found among most of the hydrobiological factors; however, seasonal variations were not significant for the diversity indices such as Shannon-Wiener, Margalef and Evenness. The number of fish taxa caught in different mesh size gill nets was 1 inch (42 species) > 2 inch (36 species) > 4 inch (25 species), suggesting that smaller mesh nets are more suitable for assessing the diversity of fishery resources. SIMPER analysis showed that Coilia dussumieri was the most abundant species in the dry (10.3%) and intermediate (8.1%) seasons, whereas N. caelata was most abundant in the wet season (7.1%). Significant differences (ANOSIM and nMDS) were observed in the species community structure between dry-intermediate and dry-wet seasons; however, species compositions were not significantly different between intermediate and wet seasons. Canonical correspondence analysis (CCA) showed that most of the species assemblages were positively correlated with turbidity and chlorophyll a, followed by phosphate, nitrate and zooplankton density. The findings suggest that the Sibuti mangrove estuary is productive in terms of diversified fishery resources, which are influenced by the hydrobiological factors.

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Section: Discussionmentioning

confidence: 97%

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Hoque

Kamal

Idris

et al. 2015

Marine Biology Research

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“…During June 1976, when salinities throughout Lake St Lucia were < 3 &, a minimum of 100,000 fish of marine origin, belonging to at least seven species, died when water temperatures suddenly declined to 12°C . A temperature-induced fish kill involving an estimated 250,000 individuals comprising at least 21 species was noted in the winter of 1987 (Cyrus and McLean 1996) but salinities on that occasion were much higher than those recorded in June 1976. Low temperatures are not always necessary to trigger a fish kill in oligohaline waters.…”

Section: Mass Mortalities Of Fishesmentioning

confidence: 90%

“…Food chains and fish abundance Salinity change affects not only the physiology of fishes; it also impacts on the food resources for all A composite view of fish group tolerance to increasing salinities in Lake St Lucia Numbers of fish species recorded in northern Lake St Lucia under different salinity regimes (data fromvan der Elst et al 1976;Cyrus et al …”

mentioning

confidence: 99%

Fishes and salinities in the St Lucia estuarine system—a review

Whitfield

Taylor²,

Fox³

et al. 2006

Rev Fish Biol Fisheries

118

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“…According to Maes et al (2004), dissolved oxygen is one of the most important factors for fish abundance and distribution. Fish communities are highly affected by temperature within estuaries (Cyrus & Mclean 1996). A sudden increase or decrease in water temperature may cause fish mortality (Blaber 2000).…”

Section: Environmental Parametersmentioning

confidence: 99%

Temporal and spatial distribution of fish and shrimp assemblage in the Bakkhali river estuary of Bangladesh in relation to some water quality parameters

Rashed-Un-Nabi

Al-Mamun

Ullah

et al. 2011

Marine Biology Research

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Fish and shrimp species, together with water quality data, were collected from two different stations located inside the Bakkhali river estuary of Bangladesh during winter, premonsoon and monsoon periods. Significant temporal differences were observed for water temperature, salinity and dissolved oxygen. The average catch of fish and shrimps per net between stations varied between 1.8990.36 kg at station 1 and 7.5494.39 kg at station 2, while the average catch in winter, premonsoon and monsoon periods was found to be 2.7991.08 kg/net, 6.3191.03 kg/net and 5.0692.89 kg/net, respectively, with a significant difference in catch per net between stations although no significant difference in catch per net was observed between seasons. A total of 18,467 individuals of fish (35 species) and shrimp (10 species) were found in the present study. Three species of shrimps were observed to be dominant ( 10.0%) and these were Metapenaeus lysianassa (17.07%), Ambassis dussumieri (14.54%) and Macrobrachium villosimanus (12.13%). Clear differences in faunal abundances were observed between seasons and stations with higher mean abundances during winter (1747.839421.99 individuals/5 kg) and at Station 1 (14449866.74 individuals/5 kg). Similarly, the diversity indices, both ShannonÁWiener and Margalef, showed significant differences between stations and seasons (except Shannon for stations). Analyses of similarity (ANOSIM) results confirm both spatial and temporal differences in species community structure with a highly diverse assemblage. Canonical Correspondence Analysis results indicated that salinity and transparency were the main variables influencing fish and shrimp distribution in the Bakkhali river estuary.

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Water Temperature and the 1987 Fish Kill at Lake St Lucia on the South Eastern Coast of Africa

Cited by 22 publications

References 3 publications

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Fishes and salinities in the St Lucia estuarine system—a review

Temporal and spatial distribution of fish and shrimp assemblage in the Bakkhali river estuary of Bangladesh in relation to some water quality parameters

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