Use by juvenile barramundi, Lates calcarifer (Bloch), and other fishes of temporary supralittoral habitats in a tropical estuary in Northern Australia

1983 ◽  
Vol 34 (5) ◽  
pp. 805 ◽  
Author(s):  
DJ Russell ◽  
RN Garrett
Keyword(s):  
Juvenile Fish ◽  
River Estuary ◽  
Temporary Pools ◽  
Tropical Estuary ◽  
Northern Australia ◽  
Tidal Inundation ◽  
Important Food ◽  
Lates Calcarifer ◽  
Commercially Important ◽  
Food Fish

Use by fishes of temporary pools created by high seasonal tides, which occur each year from October until April, on the saltpans and littorals adjacent to the Norman River estuary in northern Queensland was investigated. Fish entering the pools were sampled with one-way tidal traps placed in inlet gutters, and fish in the pools were poisoned using rotenone. Recruitment to the pools by fish occurred soon after the initial tidal inundation. Juvenile fish of 37 species, including the commercially important food fish L. calcarifer, used the pools. The first barramundi were found 8 weeks after initial inundation and for the remainder of the study they continually migrated into these habitats. The total length of the smallest L. calcarifer sampled was 9.5 mm. Salinities in pools containing fish ranged from 94 × 10-3 to less than 1 × 10-3 and temperatures reached 36�C.

Study on Biometric Parameters and Genetic Diversity of Labeo rohita from Harike Wetland-A Ramsar Site

2020 ◽  
Author(s):  
Surjya Narayan Datta ◽  
Armaandeep Kaur ◽  
Anuj Tyagi
Keyword(s):  
Genetic Diversity ◽  
Labeo Rohita ◽  
Coi Gene ◽  
Series Data ◽  
Ramsar Site ◽  
Important Food ◽  
Commercially Important ◽  
Food Fish ◽  
Harike Wetland ◽  
Catch Composition

Background: Harike wetland (31°08¢ N to 31°23¢ N latitudes and 74°90¢ E to 75°12¢ E longitudes) is an internationally important Ramsar site, supports rare, vulnerable and endangered plants, fish and other faunal species. Weed infestation, pollution and encroachment are considered as important threats of its biota thus time series data with respect to fish diversity, catch composition and genetic variability has an utter importance to interpret changes over time. Cyprinidae family of freshwater fishes includes carps is the largest fish family found in Harike wetland comprising around 50% of total fish composition by weight basis and among carps, Rohu (Labeo rohita) is one of the commercially important food fish species available throughout the year and preferred by consumers. As river Beas and Sutlej, two major rivers of Indus river system confluence at Harike thus possibility of variation within fish stock is very high. With this background present study was carried out to evaluate the fish biodiversity and catch composition of Harike wetland. Study also emphasized on biometrics, length –weight relationship and genetic diversity based on mitochondrial marker genes of commercially important food fish Labeo rohita. Methods: Assessment of fish catch composition and diversity were conducted in landing centre adjacent to Harike wetland through Rapid Fisheries Assessment by Market Survey (RFAMS) technique. Fin tissue samples were collected for genetic diversity analysis of L. rohita by cytochrome oxidase subunit I (COI) gene sequencing, From the fish genomic DNA a partial fragment of approximately 655bp was PCR amplified by FishF1 (5'-TCAACCAACCACAAAGACATTGGCAC-3') and FishR1 (5'-TCGACTAATCATAAAGATATCGGC AC-3') primer pair. Calculation of intraspecific mean and pairwise distances was performed by MEGA 6.0 software using the K2P parameters Results: Total 30 species of fishes were recorded from Harike wetland and these belong to 14 families and 21 genera. In L. rohita average weight (Wt), total length (TL), standard length (SL) and forked length (FL) were recorded 2600±5.64g (1700-3600 g), 58.2±5.65 cm (51.3-67.6cm), 48.0±8.54 cm (42.5-55.5cm) and 46.0±0.25 cm (38.0-54.5cm), respectively. Biometric study revealed that sufficient numbers of mature L. rohita are available in wetland. L. rohita established negative algometric growth (b= 2.701); thus species became slender as it increased in length. The pairwise distances ranged from 0.00 to 18.49% with a mean ±S.E value of 4.70%±0.40. Total of 9 haplotypes were observed in L. rohita COI sequences. The diversity in haplotype and nucletide values were observed 0.848 and 0.024, respectively. The present study states that L. rohita stocks in Harike wetland are genetically diverse.

scholarly journals Fatty acid composition analyses of commercially important fish species from the Pearl River Estuary, China

PLoS ONE ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. e0228276 ◽  
Author(s):  
Xiyang Zhang ◽  
Xi Ning ◽  
Xiaoxiao He ◽  
Xian Sun ◽  
Xinjian Yu ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Fish Species ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
Commercially Important ◽  
The Pearl River ◽  
Important Fish

Are vegetated areas more attractive for juvenile fish in estuaries? A comparison in a tropical estuary

2018 ◽  
Vol 101 (10) ◽  
pp. 1427-1442 ◽  
Author(s):  
Rayssa Soares da Silva ◽  
Alexandra Sofia Baptista Vicente Baeta ◽  
André Luiz Machado Pessanha
Keyword(s):  
Juvenile Fish ◽  
Tropical Estuary

Variability in the growth, feeding and condition of barramundi (Lates calcarifer Bloch) in a northern Australian coastal river and impoundment

2015 ◽  
Vol 66 (10) ◽  
pp. 928 ◽  
Author(s):  
D. J. Russell ◽  
F. E. Thomson ◽  
P. A. Thuesen ◽  
T. N. Power ◽  
R. J. Mayer
Keyword(s):  
Prey Species ◽  
Prey Availability ◽  
Juvenile Fish ◽  
Fish Growth ◽  
Lates Calcarifer ◽  
Resource Limited ◽  
Tropical Australia ◽  
Coastal River ◽  
Freshwater River ◽  
River Fish

Lates calcarifer supports important fisheries throughout tropical Australia. Community-driven fish stocking has resulted in the creation of impoundment fisheries and supplemental stocking of selected wild riverine populations. Using predominantly tag–recapture methods, condition assessment and stomach flushing techniques, this study compared the growth of stocked and wild L. calcarifer in a tropical Australian river (Johnstone River) and stocked fish in a nearby impoundment (Lake Tinaroo). Growth of L. calcarifer in the Johnstone River appeared resource-limited, with juvenile fish in its lower freshwater reaches feeding mainly on small aytid shrimp and limited quantities of fish. Growth was probably greatest in estuarine and coastal areas than in the lower freshwater river. Fish in Lake Tinaroo, where prey availability was greater, grew faster than either wild or stocked fish in the lower freshwater areas of the Johnstone River. Growth of L. calcarifer was highly seasonal with marked declines in the cooler months. This was reflected in both stomach fullness and the percentage of fish with empty stomachs but the condition of L. calcarifer was similar across most sites. In areas where food resources appear stretched, adverse effects on resident L. calcarifer populations and their attendant prey species should be minimised through cessation of, or more conservative, stocking practices.

Characterisation of microcontaminants in Darwin Harbour, a tropical estuary of northern Australia undergoing rapid development

2015 ◽  
Vol 536 ◽  
pp. 639-647 ◽  
Author(s):  
Veronica A. French ◽  
Susan Codi King ◽  
Anu Kumar ◽  
Grant Northcott ◽  
Keith McGuinness ◽  
...  
Keyword(s):  
Rapid Development ◽  
Tropical Estuary ◽  
Northern Australia

Biology of two commercially important carcharhinid sharks from northern Australia

1986 ◽  
Vol 37 (6) ◽  
pp. 671 ◽  
Author(s):  
JD Stevens ◽  
PD Wiley
Keyword(s):  
Stomach Contents ◽  
Size At Maturity ◽  
Northern Australia ◽  
Gill Net ◽  
Average Litter Size ◽  
Commercially Important ◽  
Mature Fish ◽  
Reproductive Cycles ◽  
Size At Birth ◽  
Pelvic Fin

Sharks represent 78% of the total catch by weight of a Taiwanese surface gill-net fishery off northern Australia. Two carcharhinids, Carcharhrnus tilstoni (previously described as C. limbatus) and C. sorrah, together comprise 83% of this shark catch by number. C. tilstoni is distinguished from C. limbatus by differences in enzyme systems, vertebral counts, size data and pelvic fin coloration. Of the specimens of C. tilstoni and C. sorrah caught in the Arafura and Timor Seas from 1981 to 1983, 43% and 47%, respectively, were female; at birth these proportions were 46% and 50%, respectively. In both species, females tended to be relatively more abundant in catches of mature fish, except around March, when males predominated. In northern Australia, the usual size at maturity for C. tilstoni is 110 cm for males and 115 cm for females; for C. sorrah, it is 90 cm and 95 cm, respectively. Both species exhibit placental viviparity and have almost identical restricted reproductive cycles. Mating occurs in February-March, ovulation in March-April and the main parturition period is in January. The gestation period is 10 months and individual fish breed each year. The average litter size for both species is three. The size at birth is about 60 cm for C. tilstoni and 50 cm for C. sorrah. Stomach contents indicate that teleost fish are an important component of the diet of both species and there is some indication of a change in feeding depth with shark size.

Does the quantity and timing of fresh water flowing into a dry tropical estuary affect year-class strength of barramundi (Lates calcarifer)?

2004 ◽  
Vol 55 (8) ◽  
pp. 787 ◽  
Author(s):  
Jonathan Staunton-Smith ◽  
Julie B. Robins ◽  
David G. Mayer ◽  
Michelle J. Sellin ◽  
Ian A. Halliday
Keyword(s):  
Fresh Water ◽  
River Flow ◽  
Juvenile Fish ◽  
Early Life History ◽  
Relative Strength ◽  
Estuarine Fish ◽  
Causal Mechanism ◽  
Lates Calcarifer ◽  
Nursery Habitats ◽  
Class Strength

The influence of fresh water flowing into estuaries on biological processes, such as recruitment of juvenile fish, is poorly understood, but important if freshwater resources are to be managed sustainably. Typically, lagged correlations between freshwater flows and fisheries production (i.e. catch) are used to support speculation that flows affect the survival of fish (and thus year-class strength) during their first year of life. The present study compares the relative strength of year classes in an estuarine fish population with two indices of fresh water flowing into the estuary, river flow and coastal rainfall. Year-class strength was estimated from a subset of the age structure of commercially caught adult barramundi (Lates calcarifer), which were sampled at seafood processors for three consecutive years. Strong and coherent fluctuations in year-class strength were observed. Positive correlations were found between the abundance of year classes (accounting for age) and quantity of fresh water flowing into the estuary during spring and summer, when barramundi spawn and young-of-the-year recruit to nursery habitats. Regression analysis was used to explore the relationships between year-class strength and environmental variables. A possible, but unproven, causal mechanism for the relationship is that the quantity of fresh water flowing into the estuary during spring and summer influences the survival of early life-history stages of barramundi (i.e. juvenile recruitment) by altering accessibility, productivity and or carrying capacity of nursery habitats.

scholarly journals Body Size Distribution and Ovarian Histology of Pisodonophis boro (Hamilton, 1822) (Anguillifomes: Ophichthidae) from Pranburi River Estuary, Thailand

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Phakorn Na Lampang ◽  
◽  
Amphornphan Palasai ◽  
Sinlapachai Senarat ◽  
Wannee Jiraungkoorskul ◽  
...  
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
River Estuary ◽  
Reproductive Mode ◽  
Sex Reversal ◽  
Mean Value ◽  
The Body ◽  
Spatial Displacement ◽  
Macroscopic Observation ◽  
Commercially Important

Reproductive characteristics on the snake eel Pisodonophis boro, a commercially important and high-value food source species in Thailand, have never been reported. We determined the body size distribution and gonadal structure of P. boro during the reproductive cycle. Healthy specimens were collected by local Pranburi River stuarine fishermen during March 2015 to March 2016. The total length of P. boro ranged from 24 cm to 97 cm with mean value of 66.28 ± 2.59 cm (N = 105, mean ± SD). Subsequent macroscopic observation demonstrated that the gonad of P. boro is a paired and elongated organ located parallel to the digestive tract. Surprisingly, the 105 specimens were all female, suggesting the protogynous sex reversal or spatial displacement of sexes in this species. Furthermore, only early and late perinucleolar stage oocytes were histologically identified throughout this study (synchronous developing type), which is often observed in semelparous fish species. These unique reproductive features of this eel in Thailand warrants further investigations on the male-female distribution and precise reproductive mode.

scholarly journals Length-weight relationships of the Indian Major Carp, Labeo rohita (Cypriniformes: Cyprinidae) from six drainages of Ganga basin, India

2015 ◽  
Vol 7 (1) ◽  
pp. 71-77
Author(s):  
Javaid Iqbal Mir ◽  
Uttam Kumar Sarkar ◽  
Om Prakash Gusain ◽  
Arvind Kumar Dwivedi
Keyword(s):  
Labeo Rohita ◽  
Main Channel ◽  
Coefficient Of Determination ◽  
Important Food ◽  
Indian Major Carp ◽  
Ganga Basin ◽  
Natural Range ◽  
Food Fish ◽  
Management And Conservation ◽  
Tropical Freshwater

The Indian Major Carp, Labeo rohita, is a geographically widespread and economically important food fish species in tropical freshwater of India and adjacent countries. We studied the lengthweightrelationships of 1 033 specimens collected from the main channel of Ganga river and its five major drainages from March 2009 to July 2012. The length of males ranged from 16 to 92cm (females: 16to 94cm). The growth is allometric positive (b>3) for males, females and pooled sexes. The coefficient of determination (r2) in males ranged from 0,978 to 0,989 and for females from 0,958 to 0,985. Data from field populations are scarce and our results will be useful in the management and conservation of L. rohita populations in its natural range.

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