Length‐weight relationships of six tropical estuarine fish species from Pulicat lagoon, India

2019 ◽  
Vol 36 (1) ◽  
pp. 125-127 ◽  
Author(s):  
Moulitharan Nallathambi ◽  
Jayakumar N ◽  
Uma Arumugam ◽  
Praveenraj Jayasimhan ◽  
Sudhan Chandran ◽  
...  
Keyword(s):  
Fish Species ◽  
Estuarine Fish ◽  
Tropical Estuarine ◽  
Pulicat Lagoon

scholarly journals Preliminary assessment of surf-zone and estuarine line-fish species of the Dwesa-Cwebe Marine Protected Area, Eastern Cape, South Africa

Koedoe ◽  
2012 ◽  
Vol 54 (1) ◽  
Author(s):  
Jan A. Venter ◽  
Bruce Q. Mann
Keyword(s):  
South Africa ◽  
Law Enforcement ◽  
Fish Species ◽  
Protected Area ◽  
Surf Zone ◽  
Marine Protected Area ◽  
Fish Populations ◽  
Estuarine Fish ◽  
Catch Per Unit Effort ◽  
Preliminary Assessment

A preliminary assessment of surf-zone and estuarine line fish was carried out in the DwesaCwebe Marine Protected Area (MPA), on the Wild Coast, South Africa. The purpose was to provide baseline data on inshore line-fish stocks in the MPA. A total of 28 species was recorded, of which 53% have a conservation status reflecting some concern and 43% are endemic to southern Africa. This highlights the value of the MPA for protection of important line-fish species. Within the MPA, localised differences were detected in species diversity, size frequency and catch per unit effort between unexploited and illegally exploited areas. These differences were more prominent in slow growing, long-lived species. It thus appears that illegal exploitation is negatively affecting fish populations within the MPA, which counteract and potentially could eliminate the benefits of fish protection typically associated with no-take MPAs. These results highlight the need for improved law enforcement and better communication with neighbouring communities to increase awareness. It is further recommended that the current no-take status of the MPA should be maintained. In addition, baseline fisheries information was collected on certain fish species that could be used to inform future conservation management of the MPA.Conservation implications: The Dwesa-Cwebe Marine Protected Area is unique and important for the conservation of key surf zone and estuarine fish species. However there is a significant risk to the fish populations due to illegal exploitation. Key interventions should include enhanced law enforcement but, more important, the creation of alternative livelihoods and long term sustainable benefits to local communities.

scholarly journals The contribution of environmental factors to fish assemblages in the Río Acahuapa, a small drainage in Central America

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Francisco S. Álvarez ◽  
Wilfredo A. Matamoros ◽  
Francisco A. Chicas
Keyword(s):  
Fish Species ◽  
Habitat Structure ◽  
Fish Assemblages ◽  
Species Abundance ◽  
Main Channel ◽  
Estuarine Fish ◽  
Species Origin ◽  
High Temperature Water ◽  
Distribution Of Fish ◽  
Temperature Water

ABSTRACT The ichthyofauna of the Río Acahuapa was analyzed sampling 17 sites that included the basin main channel and its tributaries. Fish were collected using dip-nets, seine-nets and electrofishing. Fish standard length and species abundance were recorded. Species origin and salinity tolerance criteria were used to classify fish species. Water physicochemical variables, habitat structure and sampling sites elevation were recorded. A total of 33 fish species were registered, 12.1% are primary, 45.5% are secondary and 42.4% are of marine derivation. Fish species richness declined with increase of elevation (R2=0.55, p=0.0006). Two assemblages of fishes were identified: the first one associated to sites of low elevations (19-184 masl), composed mainly of secondary and marine-estuarine fish species related with high temperature, water velocity, river width, dissolved oxygen and low sand and silt substrate cover; the second one associated to sites of middle and higher elevations (185-519 masl), composed by primary and secondary freshwater fishes related with high pH, logs and rocks substrate cover. In summary, elevation and environmental variables contributed to the composition and distribution of fish in the Río Acahuapa.

scholarly journals Influence of seasonality and pollution on the hematological parameters of the estuarine fish Centropomus parallelus

2013 ◽  
Vol 61 (2) ◽  
pp. 105-111 ◽  
Author(s):  
Robson Seriani ◽  
Denis Moledo de Souza Abessa ◽  
Camilo D. S. Pereira ◽  
Aline A. Kirschbaum ◽  
Andrea Assunção ◽  
...  
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Mean Corpuscular Volume ◽  
Hematological Parameters ◽  
Absolute Number ◽  
Aquatic Pollution ◽  
Estuarine Fish ◽  
Corpuscular Volume ◽  
Tropical Estuarine ◽  
Non Destructive

This study investigated the hematological parameters of the tropical estuarine fish Centropomus parallelus and their use as a non-destructive biomarker for aquatic pollution. Individuals were collected, in summer and winter, at two estuaries, Cananéia (CAN) and São Vicente (SVE), and blood was extracted by caudal puncture. The evaluated parameters were hematocrit (Ht), red blood cells (RBC), Mean Corpuscular Volume (MCV), and the leukocyte (WBC) and thrombocyte counts. Fishes from CAN showed higher values of absolute number of thrombocytes in the summer. The fishes from SVE presented lower values of Ht and MCV in winter. Comparing the hematological parameters of fishes from these two sites, Ht, MCV, WBC and RBC were higher in fishes from SVE in the summer, whereas during the winter, Ht and thrombocytes were higher in animals from SVE. The results allow attributing the changes in the blood of fishes to seasonality and the presence of contaminants.

scholarly journals More Than Just a Spawning Location: Examining Fine Scale Space Use of Two Estuarine Fish Species at a Spawning Aggregation Site

2017 ◽  
Vol 4 ◽  
Author(s):  
Ross E. Boucek ◽  
Erin Leone ◽  
Joel Bickford ◽  
Sarah Walters-Burnsed ◽  
Susan Lowerre-Barbieri
Keyword(s):  
Fish Species ◽  
Space Use ◽  
Scale Space ◽  
Estuarine Fish ◽  
Fine Scale ◽  
Spawning Aggregation ◽  
Aggregation Site

Histopathological biomarkers in estuarine fish species for the assessment of biological effects of contaminants

2003 ◽  
Vol 55 (2) ◽  
pp. 137-159 ◽  
Author(s):  
G.D Stentiford ◽  
M Longshaw ◽  
B.P Lyons ◽  
G Jones ◽  
M Green ◽  
...  
Keyword(s):  
Fish Species ◽  
Biological Effects ◽  
Estuarine Fish

Impact of salinity on early life history traits of three estuarine fish species in Senegal

2009 ◽  
Vol 82 (4) ◽  
pp. 673-681 ◽  
Author(s):  
Maylis Labonne ◽  
Eric Morize ◽  
Pierre Scolan ◽  
Raymond Lae ◽  
Eric Dabas ◽  
...  
Keyword(s):  
Life History ◽  
Fish Species ◽  
Early Life ◽  
Life History Traits ◽  
Early Life History ◽  
Estuarine Fish
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