scholarly journals Fish distribution pattern and environmental influence in the Bandama River estuary (West Africa)

2021 ◽  
Vol 9 (1) ◽  
pp. 06-13
Author(s):  
Koné TS ◽  
Kamelan TM ◽  
Konan YA ◽  
Etilé RN ◽  
Lozo RN ◽  
...  
Keyword(s):  
West Africa ◽  
Distribution Pattern ◽  
Environmental Influence ◽  
River Estuary ◽  
Fish Distribution

Risk factors associated with Enteromyxum scophthalmi (Myxozoa) infection in cultured turbot, Scophthalmus maximus (L.)

Parasitology ◽  
2006 ◽  
Vol 133 (4) ◽  
pp. 433-442 ◽  
Author(s):  
M. I. QUIROGA ◽  
M. J. REDONDO ◽  
A. SITJÀ-BOBADILLA ◽  
O. PALENZUELA ◽  
A. RIAZA ◽  
...  
Keyword(s):  
Risk Factors ◽  
Distribution Pattern ◽  
Control Strategies ◽  
Host Density ◽  
Scophthalmus Maximus ◽  
Fish Distribution ◽  
Fish Mortality ◽  
Infection Prevalence ◽  
Western Spain ◽  
Turbot Scophthalmus Maximus

An epidemiological cohort study of Enteromyxum scophthalmi in cultured turbot was performed on a farm in North Western Spain. Four different ongrowing stocks (A, B, C, D) were monitored monthly until market size. Fish from stocks C and D were divided into 2 subgroups, receiving filtered (CF and DF) or unfiltered (CUF and DUF) water. The lack of water filtration was positively associated with infection prevalence, as all fish kept in filtered water remained uninfected. Parasite abundance varied seasonally (P<0·05) in stock B and subgroup CUF. Infection was also associated (P<0·05) with host weight, and the highest prevalences and intensities were detected in 101–200 g and 201–300 g fish. Distribution pattern of E. scophthalmi in subgroups CUF and DUF had a variance higher than the mean, indicating overdispersion. The minimum period necessary for the first detection of the parasite and for the appearance of disease symptoms and mortality, varied depending on the stock and introduction date, although a long pre-patent period was always observed. Several factors, such as host density, parasite recruitment and parasite-induced fish mortality can contribute to the observed distribution pattern. Risk factors found to be associated with E. scophthalmi infection, including water quality and accumulation of infective stages in the culture tanks, should be considered when designing control strategies to prevent the introduction and spread of infective stages in the facilities.

scholarly journals Relationship between fish distribution pattern and geomorphology in the Konan area surrounding the southern part of Lake Biwa.

2001 ◽  
Vol 62 (3) ◽  
pp. 261-270 ◽  
Author(s):  
Tsuneo NAKAJIMA ◽  
Yasuhiro FUJIOKA ◽  
Masayoshi MAEHATA ◽  
Taisuke OHTSUKA ◽  
Katsuyuki FUJIMOTO ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Lake Biwa ◽  
Fish Distribution

Emended description and geographical distribution of Sporisorium elegantis (Ustilaginaceae), a species shared between West Africa and India

Phytotaxa ◽  
2014 ◽  
Vol 175 (3) ◽  
pp. 148 ◽  
Author(s):  
Marcin Piątek ◽  
Jolanta Piątek ◽  
Nourou S. Yorou
Keyword(s):  
West Africa ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Rare Species ◽  
Smut Fungus ◽  
Smut Fungi ◽  
Western Africa ◽  
Emended Description ◽  
First Time

Sporisorium elegantis, a smut fungus on Thelepogon elegans, is reported for the first time from Benin (West Africa). Based on this collection, an emended description and illustration of this rare species are provided. The geographical distribution of Sporisorium elegantis is documented for Benin, Nigeria and India. The disjunctive occurrence of this species between (western) Africa and India is interesting, though not exceptional in smut fungi. The mechanisms responsible for such a distribution pattern are not known.

scholarly journals Functional structure of microbial food web in the Senegal River Estuary (West Africa): impact of metazooplankton

2006 ◽  
Vol 28 (2) ◽  
pp. 195-207 ◽  
Author(s):  
Marc Bouvy ◽  
Marc Pagano ◽  
Maimouna M’Boup ◽  
Patrice Got ◽  
Marc Troussellier
Keyword(s):  
West Africa ◽  
Food Web ◽  
River Estuary ◽  
Functional Structure ◽  
Microbial Food Web ◽  
Senegal River

Different key roles of mesoscale oceanographic structures and ocean bathymetry in shaping larval fish distribution pattern: A case study in Sicilian waters in summer 2009

2016 ◽  
Vol 115 ◽  
pp. 6-17 ◽  
Author(s):  
Angela Cuttitta ◽  
Enza Maria Quinci ◽  
Bernardo Patti ◽  
Sergio Bonomo ◽  
Angelo Bonanno ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Larval Fish ◽  
Fish Distribution

The Gambia River estuary: A reference point for estuarine fish assemblages studies in West Africa

2006 ◽  
Vol 69 (3-4) ◽  
pp. 615-628 ◽  
Author(s):  
Monique Simier ◽  
Charline Laurent ◽  
Jean-Marc Ecoutin ◽  
Jean-Jacques Albaret
Keyword(s):  
West Africa ◽  
Reference Point ◽  
Fish Assemblages ◽  
River Estuary ◽  
The Gambia ◽  
Estuarine Fish

scholarly journals KOMPOSISI LARVA IKAN DI KAWASAN KOSERVASI MANGROVE DUSUN SENIK, DESA BEDONO, KECAMATAN SAYUNG, DEMAK

2018 ◽  
Vol 6 (2) ◽  
pp. 147-155
Author(s):  
Rexa Kurnia Rinaldi ◽  
Niniek Widyorini ◽  
Pujiono Wahyu Purnomo
Keyword(s):  
Distribution Pattern ◽  
Larval Fish ◽  
Fish Larvae ◽  
Mangrove Ecosystem ◽  
Fish Distribution ◽  
Sampling Point ◽  
Conservation Area ◽  
Morisita Index ◽  
Early Growth Phase ◽  
Mangrove Conservation

ABSTRAK Stadia larva merupakan fase pertumbuhan awal ikan. Distribusi dan Kelimpahan larva ikan di Ekosistem Mangrove merupakan proses rekruitmen alami. Kawasan Konservasi Mangrove Dusun Senik Desa Bedono merupakan daerah asuhan dan daerah mencari makan bagi larva ikan, saat ini daerah tersebut terkena abrasi. Hilangnya sebagian besar daratan memberikan pengaruh terhadap distribusi dan kelimpahan larva ikan. Penelitian ini bertujuan untuk mengetahui jenis, kelimpahan, dan sebaran larva ikan di kawasan konservasi mangrove Desa Bedono. Penelitian dilakukan di Kawasan Konservasi Mangrove Desa Bedono bulan September - Oktober 2016.  Metode penelitian yang digunakan adalah survei dengan penentuan titik sampling secara purposive. Hasil yang diperoleh jumlah larva ikan yang tertangkap sebanyak 20.320 individu/150m3 yang terdiri dari 12 famili yaitu: Mugilidae (1.120 ind/150m3), Chanidae (20 ind/150m3), Gerreidae (60 ind/150m3), Apogonidae (17.360 ind/150m3),  Scatophagidae (40 ind/150m3), Gobiidae (180 ind/150m3), Belonidae (40 ind/150m3), Ambassidae (20 ind/150m3), Lutjanidae (620 ind/150m3), Engraulidae (60 ind/150m3), Nemipteridae (40 ind/150m3), dan Oryziatidae (760 ind/150m3). Nilai kelimpahan larva ikan pada titik I sebesar 393 ind/150m3, titik II sebesar 607 ind/150m3, titik III sebesar 800 ind/150m3, titik IV sebesar 1.687 ind/150m3, titik V sebesar 1.633 ind/150m3, titik VI sebesar 607 ind/150m3, titik VII sebesar 235 ind/150m3, titik VIII sebesar 793 ind/150m3. Berdasarkan indeks morisita, pola sebaran larva ikan adalah acak. Kesimpulan yang dapat diambil adalah famili Apogonidae mendominasi dengan persentase 85,43%, nilai kelimpahan tertinggi terdapat pada titik IV, dan pola distribusi larva ikan menyebar secara acak yaitu keberadaan spesies tidak memiliki kecenderungan untuk hidup berkoloni dan dapat bertahan hidup di mana saja pada suatu ekosistem. Kata Kunci : Larva ikan; Komposisi; Kelimpahan; Pola Distribusi; Kawasan Konservasi Mangrove ABSTRACT Larval stage is the early growth phase of fish. Distribution and abundance of larval fish in mangrove ecosystem is a natural recruitment process. Mangrove Conservation Area at Senik hamlet Bedono village is the breeding and feeding areas for fish larvae, now the area is damaged by abrasion. The loss of the most mainland affects to the distribution and abundance of fish larvae. This study aims to determine the type, abundance and distribution of fish larvae in mangrove conservation area at Bedono village. The study was conducted in Bedono village Mangrove Conservation Area in September-October 2016. The research method that is used is a survey with purposive sampling point determination. The results obtained, the number of fish larvae caught are 20.320 individuals/150m3 consisting of 12 families, namely: Mugilidae (1.120 ind/150m3), Chanidae (20 ind/150m3), Gerreidae (60 ind/150m3), Apogonidae (17.360 ind/150m3), Scatophagidae (40 ind/150m3), Gobiidae (180 ind/150m3), Belonidae (40 ind/150m3), Ambassidae (20 ind/150m3), Lutjanidae (620 ind/150m3), Engraulidae (60 ind/150m3), Nemipteridae (40 ind/150m3), and Oryziatidae (760 ind/150m3). The value abundance of fish larvae in point I is 393 ind/150m3, in point II is 607 ind/150m3, in point III is 800 ind/150m3, point IV is 1.687 ind/150m3, point V is 1.633 ind/150m3, point VI is 607 ind/150m3, point VII is 235 ind/150m3, point VIII is 793 ind/150m3. Based on morisita index, the distribution pattern of fish larvae is random. The conclusion of this research are family Apogonidae dominates by percentage 85.43%, the highest abundance values is contained in point IV, and the  distribution pattern of fish larvae randomly spread, means that the species does not live in colonies and can survive anywhere in an ecosystem. Keywords     : Fish Larvae; Composition; Abundance; Distribution; Mangrove Conservation Area

scholarly journals INSIGHTS ON THE INFLUENCE OF PHYLOGENETIC ON THE RELATIVE GROWTH USING Atherinella brasiliensis AS A TOOL

2021 ◽  
Vol 47 ◽  
pp. e640
Author(s):  
Renato Luiz BOT NETO ◽  
Barbara Maichak de CARVALHO ◽  
Roberto SCHWARZ JÚNIOR ◽  
Henry Louis SPACH
Keyword(s):  
Frequency Distribution ◽  
Environmental Influence ◽  
River Estuary ◽  
Weight Ratio ◽  
Brazilian Coast ◽  
Constant Input ◽  
Growth Coefficient ◽  
Relative Growth ◽  
Sao Francisco River ◽  
São Francisco River

The length–weight relationships (LWR) are important tools for ichthyology, they are useful to demonstrate the environmental influence on growth. In this study we estimate the LWR of the Atherinella brasiliensis in the shallow areas of the São Francisco river estuary and compare the growth of this specie in different environments of the Brazilian coast. Specimens of Brazilian silverside (A. brasiliensis, n = 3483), between 2.1 and 13.6 cm in length, were caught in the shallow areas of the São Francisco River estuary between May 2017 and April 2018. The length-weight ratio of the species was represented by the equation y=0.0047x3.0913. Frequency distribution indicates that the species is present in the shallow areas of the São Francisco River estuary in all its ontogenetic stages and apparently reproduces throughout the year with constant input of recruits into the population. Von Bertalanffy’s growth model and longevity were adjusted to reach asymptotic length (L∞) of 14.7 cm, growth coefficient (K) of 0.91 year-1 and longevity (A95) of 3.25 years. The analysis of variance revealed differences for the maximum total length. However, the differences found between the present study and data available in the literature appear to be caused by environmental and methodological differences.

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