KERAGAMAN IKTIOFAUNA MUARA SUNGAI CIMANUK, INDRAMAYU, JAWA BARAT

2018 ◽  
Vol 17 (1) ◽  
pp. 39 ◽  
Author(s):  
Prawira ARP Tampubolon ◽  
Yunizar Ernawati ◽  
M.F. Rahardjo
Keyword(s):  
Life Cycle ◽  
River Estuary ◽  
Northern Coast ◽  
Total Fish

Cimanuk river, which the estuary formed a delta, is a habitat for many fishes that occupied the water in northern coast of Ja va. The estuary is essential for supporting the fish life cycle. The aim of this study was to asscess the diversity of ichthyo fauna in Cima nuk River estuary. The fishes were collected in three months from July to September 2013 at three locations: Pagirikan, Pabean Ilir and Song. Total fish collected were 1,826 individuals, consisted of 103 species from 41 families and 14 orders. Most of them were from Family Ambassidae,Leiognathidae, Scianidae, Gobiidae, and Ariidae.

scholarly journals Evidence of Life Cycle Diversity of River Herring in the Penobscot River Estuary, Maine

2021 ◽  
Vol 13 (3) ◽  
pp. 263-276
Author(s):  
Justin R. Stevens ◽  
Rory Saunders ◽  
William Duffy
Keyword(s):  
Life Cycle ◽  
River Estuary ◽  
River Herring ◽  
Penobscot River

Temporal variation in the weight-size relationship of the mangrove crab Ucides cordatus L. (Decapoda: Ucididae) in relation to its life cycle phases

2014 ◽  
Vol 64 (4) ◽  
pp. 333-342 ◽  
Author(s):  
Marcos de Miranda Leão Leite ◽  
Cynthia Yuri Ogawa ◽  
Carla Ferreira Rezende ◽  
José Roberto Feitosa Silva
Keyword(s):  
Life Cycle ◽  
Condition Factor ◽  
River Estuary ◽  
Total Weight ◽  
Northeastern Brazil ◽  
Annual Life Cycle ◽  
Ucides Cordatus ◽  
Mangrove Crab ◽  
Significant Difference ◽  
The Relationship

The relationship between weight and size of individuals can be used to evaluate the status of a population, which is particularly useful for natural populations that are being exploited. Ucides cordatus occurs on the Atlantic coast of the American continent, from Florida (USA) to Santa Catarina (Brazil). This species is economically very important, most of all in the Northeastern area of Brazil, as well as in the Dominican Republic and Suriname. The objective of this study was to analyze life phases (‘fattening’, ‘matumba’, ‘milk-crab’, ‘maturation’ and ‘walking’) by use of the weight-length relationships, as well as temporal variations in this condition factor for each sex of U. cordatus. For this purpose, individuals were sampled monthly for twenty-four months at the Jaguaribe River estuary, Ceará State, Northeastern Brazil. The relationship between total weight and cephalothorax width was established using regression analysis, adjusted by a power equation. The dynamics of the condition factor were analyzed for each sex using the variation of its averages related to annual life cycle; this was done for each of the previously-mentioned phases. The relationship between total weight and cephalothorax width showed an isometric growth in males and negative allometric growth in females suggesting that, for the same reference size, males are heavier than females. When considering the average of the female condition factors, these were greater than those for males during the annual life cycle, except during the ‘maturation’ phase, which is the phase with a higher demand of energetic reserves for males. Annual variation of the condition factor in females presented no significant difference.

scholarly journals Ekopreferensi Dua Jenis Avicennia Terhadap Parameter Lingkungan Di Tegakan Bakau Muara Sungai Wulan Demak

2015 ◽  
Vol 2 (3) ◽  
pp. 127
Author(s):  
Joudy R.R. Sangari
Keyword(s):  
High Tide ◽  
River Estuary ◽  
Avicennia Marina ◽  
Line Transect ◽  
Northern Coast ◽  
Mangrove Species ◽  
Central Java ◽  
Sediment Types ◽  
Key Word

Studi mengenai ekopreferensi dan dua jenis mangrove (Avicennia marina dan A. alba) dilakukan di tegakan mangrove muara sungai Wulan, Demak. Tujuan penelitian ini diarahkan untuk melihat kemampuan ekopreferensi A. marina dan A. alba terhadap salinitas, jenis sedimen dan kandungan air. Data vegetasi diperoleh dengan menggunakan transek garis yang dikombinasikan dengan cara kuadrat yang dimodifikasi dari Cox (1967) dan Mueller-Dumbois & Ellenberg (1977). Dua stasiun pengumpulan data vegetasi ditentukan secara horisontal dari garis pasang terendah sampai garis pasang tertinggi. Pengukuran parameter lingkungan dilakukan pada transek yang ada dan tanah sampel dianalisis untuk melihat fraksi tekstur. Hasil analisis menunjukkan bahwa dalam hal keragaman vegetasi, tegakan mangrove yang ada di muara Sungai Wulan miskin dalam hal komposisi jenis dibandingkan dengan tegakan mangove yang ada di sepanjang pantai utara Jawa Tengah. Studi ini juga menunjukkan bahwa kehadiran A. marina cenderung menjadi species pelopor dibandingkan dengan A. alba. Diduga hal ini disebabkan oleh kemampuan A marina untuk beradaptasi pada kondisi salinitas dan tipe tanah yang marginal. Kata kunci: Bakau, ekopreferensi, A. marina, A. alba, Muara Sungai Wulan A b s t r a c t Study on ecological preferences of two Avicennia species was carried out in Wulan River, Demak, Central Java. The sudy was aimed at revealing the eco-preference toward salinity, sediment types and water content. Vegetation data were collected by implementing line transect approach combined with quadrate methods modified according to Cox (1967) and Mueller-Dumbois & Ellenberg (1977). Two sites for vegetation data collection were set horizontally from High Tide Mark toward Low Tide Mark. All ecological parameters were measured in situ on the established transects.  The results showed that in term of mangrove species diversity this area is low or marginally poor compared to other mangrove belts along the northern coast of Central Java. The study also showed that the two Avicennia species  are the pioneer species. These two species of Avicennia are adaptable to the salinity and soil types that are poor in term of nutrients content. Key word: mangrove, ecological-preference, A. alba, A. marina, Wulan River estuary 1Staf pengajar Fakultas Perikanan dan Ilmu Kelautan UNSRAT Manado

scholarly journals Use of an estuarine environment (Barra do Saí lagoon, Brazil) as nursery by fish

2006 ◽  
Vol 23 (4) ◽  
pp. 1117-1122 ◽  
Author(s):  
Ana L. Vendel ◽  
Paulo de T. Chaves
Keyword(s):  
Life Cycle ◽  
Coastal Zone ◽  
Juvenile Fish ◽  
Freshwater Fishes ◽  
Estuarine Environment ◽  
Active Movement ◽  
Northern Coast ◽  
Average Depth ◽  
Beach Seine ◽  
Turbidity Increase

Studies were carried out at the Barra do Saí lagoon, on the northern coast of Santa Catarina State, Brazil, to evaluate the function played by this estuary in the life cycle of fish found at the coastal zone. Samplings were performed using beach seine net from December 2000 to November 2001. The continental influence is strong, as showed by the occurrence of freshwater fishes, although most of the 43 species recorded are marine ones. It was verified that around summer, when the temperature of the water is high, the values of salinity decrease and those of turbidity increase. At this time there is also an increase in the abundance of juvenile fish in the lagoon. Because of its average depth of less than 0.7 m, the lagoon is inhabited primarily by juveniles, which may enter either by active movement or passive displacement, originating from the sea or the river to which the lagoon is connected. The lagoon is not used for sheltering spawning individuals. It is showed that a shallow, small estuary with a blind bottom can conceal an importance for the coastal ichthyofauna that is greater than it could be expected from the occurrence - in this case, modest - of large individuals.

scholarly journals ANALISIS PENGARUH PARAMETER FISIK TERHADAP INDEKS KERENTANAN PANTAI (CVI) DI KAWASAN PANTAI BANDA ACEH DAN SEKITARNYA (STUDI KASUS PADA KAWASAN UJUNG PANCU SAMPAI UJUNG BATEE)

2019 ◽  
Vol 2 (2) ◽  
pp. 123-133
Author(s):  
Veri Yanti ◽  
Ella Mailianda ◽  
Syamsidik Syamsidik
Keyword(s):  
Coastal Area ◽  
River Estuary ◽  
Vulnerability Index ◽  
Physical Parameters ◽  
Northern Coast ◽  
Coastal Vulnerability ◽  
Coastal Vulnerability Index ◽  
Aceh Province ◽  
Risk Potential ◽  
Banda Aceh

A coastal area has important and vital influences on community’s lives due to the natural resource availability. The coastal area occurs any changes over time affecting the changes in the community and in the ecological perspectives. Banda Aceh is one of the coastal areas that has experienced several significant changes especially after earthquake and tsunami on December, 26th 2004. Due to the condition, it is required to analyze coastal vulnerability in Banda Aceh and neighbor. This research was aimed to investigate the influences of physic parameters consisting of hydrodynamic and morphology parameters on determining Coastal Vulnerability Index (CVI). The analysis will determine the coastal vulnerability index in one year period. The analysis was carried out in the northern coast of Aceh Province, between Ujong Pancu and Ujung Batee by dividing the areas into 5 (five) cells bordered by natural morphology feature such as inlet, headland, river estuary, and lagoon. Based on 6 (six) physical parameters used on coastal vulnerability index (CVI) determination, it is obtained that 2 cells have low risk potential (green), which are Cell 1 and Cell 3 with the CVI values are 2.45 and 3.0, respectively. Cell 2 has moderate risk potential (yellow) with CVI value is 4.24. Meanwhile, Cell 4 and Cell 5 have high risk potential (red) with CVI values are 5.20

Density of larval and adult forms of the burrowing crustaceansLepidophthalmus siriboia(Callianassidae) andUpogebia vasquezi(Upogebiidae) in an Amazon estuary, northern Brazil

2011 ◽  
Vol 92 (2) ◽  
pp. 295-303 ◽  
Author(s):  
Danielly Brito de Oliveira ◽  
Dalila Costa Silva ◽  
Jussara Moretto Martinelli
Keyword(s):  
Abiotic Factors ◽  
Benthic Communities ◽  
Larval Density ◽  
River Estuary ◽  
Abundant Species ◽  
Reproductive Period ◽  
Equatorial Region ◽  
Northern Coast ◽  
Sandy Substrate ◽  
One Year

Although thalassinidean shrimps exert considerable influence over the structure of benthic communities no ecological studies have been conducted on the larvae and adults ofLepidophthalmus siriboiaandUpogebia vasqueziin the equatorial region. The aim of the present study was to identify the reproductive period of these species in an Amazonian estuary. Monthly collections were performed in the estuary of the Marapanim River (northern coast of Brazil) over the course of one year (August 2006 to July 2007) and adults were obtained from bare sandy substrate and between boulders in the intertidal zone of the estuary at four sites. Thalassinidean larvae were also sorted from plankton samples (200 μm mesh) collected monthly at six sites. Larvae of the speciesCallichirus major, Lepidophthalmus siriboiaandUpogebia vasqueziwere collected, whereas adults of only the latter two species were found.Upogebia vasqueziwas the most abundant species. There was no correlation between larval density and abiotic factors (water temperature, salinity and pH); however, the density ofU. vasqueziadults was negatively correlated with salinity in the burrows.Lepidophthalmus siriboiaandU. vasquezireproduce throughout the year in the Marapanim River estuary, with peaks of greater intensity in some reproductive periods of the year, mainly correlated with changes in salinity.

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