Composition, Density and Spatial Distribution of Zooplankton in Inner Ambon Bay, Indonesia

Inner Ambon Bay is part of Ambon Bay; it is semi-closed area and a small pelagic fish fishing ground, especially anchovy. The anchovy is a zooplankton predator; therefore the existence of anchovy is affected by the abundance of zooplankton. The aims of the research are to obtain information on the composition, density, and spatial distribution of the zooplankton in these waters. Data of zooplankton composition were obtained from sampling by using plankton net at ten observation stations. Meanwhile, data of densities were collected using a scientific hydroacoustic system, BioSonic DTX supported with split-beam technology, on six parallel transect lines and one cross-parallel transect line. Geostatistical analyses technique was used to describe horizontal distributions of zooplankton, and vertical distributions pattern were plot in the graphs. The result shows that the zooplankton community is dominated by Copepod and meroplankton. The highest average density was found in August (9393 ind./m2),while the lowest density was in June (903 ind./m2).

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Inferring the location and scale of mixing between habitat areas of lesser sandeel through information from the fishery

ICES Journal of Marine Science ◽

10.1093/icesjms/fsq154 ◽

2010 ◽

Vol 68 (1) ◽

pp. 43-51 ◽

Cited By ~ 31

Author(s):

Henrik Jensen ◽

Anna Rindorf ◽

Peter J. Wright ◽

Henrik Mosegaard

Keyword(s):

North Sea ◽

Large Scale ◽

Pelagic Fish ◽

Fishing Ground ◽

Marine Science ◽

Foraging Habitat ◽

Small Pelagic Fish ◽

The North ◽

The North Sea

Abstract Jensen, H., Rindorf, A., Wright, P. J., and Mosegaard, H. 2011. Inferring the location and scale of mixing between habitat areas of lesser sandeel through information from the fishery. – ICES Journal of Marine Science, 68: 43–51. Sandeels are small pelagic fish that play an important role in the diet of a range of natural predators. Because of their limited capture by traditional survey gear, little is known about their large-scale distribution or the degree of mixing between habitat areas. Detailed information collected directly from the fishery was used to map fishing grounds, which were then assumed to reflect the foraging habitat of the species. Length distributions from individual hauls were used to assess differences in the distributions as a function of distance between samples. Sandeel foraging habitat covered some 5% of the total area of the North Sea. Mixing between neighbouring fishing grounds was too low to eliminate differences in length distributions at distances between grounds down to 5 km. Within fishing grounds, mixing was sufficient to eliminate differences in length distributions at scales <28 km but insufficient at greater distances. The lack of mixing between grounds may result in large differences in sandeel abundance among adjacent fishing grounds. Further, notable abundance at one end of an extensive fishing ground is not necessarily indicative of similar abundance at its other end.

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Spatial distribution of small pelagic fish larvae in the Gulf of California and its relation to the El Nino 1997-1998

Journal of Plankton Research ◽

10.1093/plankt/22.8.1611 ◽

2000 ◽

Vol 22 (8) ◽

pp. 1611-1618 ◽

Cited By ~ 29

Author(s):

L. Sanchez-Velaso

Keyword(s):

Spatial Distribution ◽

El Niño ◽

Gulf Of California ◽

El Nino ◽

Fish Larvae ◽

Pelagic Fish ◽

Small Pelagic Fish

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Bayesian posterior prediction of the patchy spatial distributions of small pelagic fish in regions of suitable habitat

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/cjfas-2014-0234 ◽

2015 ◽

Vol 72 (2) ◽

pp. 290-303 ◽

Cited By ~ 12

Author(s):

Charlotte Boyd ◽

Mathieu Woillez ◽

Sophie Bertrand ◽

Ramiro Castillo ◽

Arnaud Bertrand ◽

...

Keyword(s):

Spatial Distribution ◽

Gaussian Random Field ◽

Pelagic Fish ◽

Suitable Habitat ◽

Small Pelagic Fish ◽

Geostatistical Methods ◽

Modelling Framework ◽

Spatial Parameters ◽

Simulated Test ◽

Engraulis Ringens

Small pelagic fish aggregate within areas of suitable habitat to form patchy distributions with localized peaks in abundance. This presents challenges for geostatistical methods designed to investigate the processes underpinning the spatial distribution of stocks and simulate distributions for further analysis. In two-stage models, presence–absence is treated as separable and independent from the process explaining nonzero densities. This is appropriate where gaps in the distribution are attributable to one process and conditional abundance to another, but less so where patchiness is attributable primarily to the strong schooling tendencies of small pelagic fish within suitable habitat. We therefore developed a new modelling framework based on a truncated Gaussian random field (GRF) within a Bayesian framework. We evaluated this method using simulated test data and then applied it to acoustic survey data for Peruvian anchoveta (Engraulis ringens). We assessed the method’s performance in terms of posterior densities of spatial parameters, and the density distribution, spatial pattern, and overall spatial distribution of posterior predictions. We conclude that Bayesian posterior prediction based on a truncated GRF is effective at reproducing the patchiness of the observed spatial distribution of anchoveta.

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ZOOPLANKTON COMMUNITY IN LAMALERA SEA AND SAWU SEA, EAST NUSA TENGGARA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v5i1.7770 ◽

2013 ◽

Vol 5 (1) ◽

Author(s):

Nurul Fitriya ◽

Muhammad Lukman

Keyword(s):

Spatial Distribution ◽

Community Structure ◽

Surface Water ◽

Marine Mammals ◽

Diversity Index ◽

Monsoon Season ◽

Zooplankton Community ◽

Fishing Ground ◽

Small Species ◽

North And South

Zooplankton community was studied in Lamalera Sea and Sawu Sea during DIKTI-P2O LIPI Expedition from 19 – 30 July 2011. Besides being a potential fishing ground, the Lamalera sea and Sawu Sea have been a migration path for Cetacean (large marine mammals), particularly during the southeast monsoon season. The purposes of this study were to investigate community structure, abundance, and spatial distribution of zooplankton in the Lamalera Sea and the Sawu Sea. Plankton samples were collected from 23 stations, by NORPAC 300 µm-net that was vertically hauled from maximum 200 meter depth up to the surface water. The result showed that there were 45 taxa of zooplankton, which was dominated by copepods . The abundance of the zooplankton between 491 - 4537 individu/m3. Average diversity index and evenness values were 1.59 ± 0.21 and 0.50 ± 0.04, respectively. In this area, Creel has been found in all research stations but the abundance was small. Species composition was relatively the same between sampling stations suggesting that there was no different in composition between north and south parts, which virtually comprise of different water masses. It showed that spatial distribution of zooplankton was relatively wide-reaching. Keywords: zooplankton, copepoda, creel, Lamalera sea, and Sawu Sea.

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Characterisation of season-wise spatial distribution of small pelagic fishery in Kerala, south-west coast of India

Indian Journal of Fisheries ◽

10.21077/ijf.2019.66.4.66415-03 ◽

2019 ◽

Vol 66 (4) ◽

Author(s):

P.H. Dhiju Das ◽

C.G. Joshy ◽

Leela Edwin

Keyword(s):

Pelagic Fish ◽

Additive Models ◽

Fish Abundance ◽

Fishing Ground ◽

Small Pelagic Fish ◽

Geostatistical Methods ◽

South West Coast ◽

Spatial Parameters ◽

Pelagic Fishing ◽

Pelagic Fishery

In this study, we attempted to identify and characterise the spatial variability of small pelagic fish abundance using geostatistical methods. The small pelagic fish abundance was estimated in terms of spatial parameters using generalised additive models (GAMs). The ring seine fishing grounds in the south-eastern Arabian Sea exhibited seasonal variability in distribution. Results of the study would help in prediction of the major pelagic fishing grounds for traditional fishers which would help in reducing fuel and time spent on searching for the fishing ground leading to sustainable exploitation. The prediction model can contribute to the management of pelagic fishery along the Kerala coast.

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Oceanographic Conditions on Small Pelagic Fishery in the Gulf of Bone Waters

TORANI: Journal of Fisheries and Marine Science ◽

10.35911/torani.v1i2.4442 ◽

2018 ◽

Vol 1 (2) ◽

Cited By ~ 1

Author(s):

Safruddin Safruddin ◽

Rachmat Hidayat ◽

Mukti Zainuddin

Keyword(s):

Chlorophyll A ◽

Generalized Additive Models ◽

Pelagic Fish ◽

Additive Models ◽

Fish Distribution ◽

Fishing Ground ◽

Small Pelagic Fish ◽

The Relationship ◽

Pelagic Fishery ◽

Oceanographic Conditions

This study aimed to investigate the relationship between the dinamic oceanographic condition and fluctuation in the catch of small pelagic fish. Study on the dinamic oceanographic conditions were focused on the sea surface temperature (SST), chlorophyll-a concentration (SSC) and water depth. The study took place in the area of Gulf of Bone located, data collection was started from April to September 2017. The data were collected using experimental fishing metode (large liftnet) and applications of remote sensing in satellite oceanography, which then analysed using Geographic Information System (GIS) dan Generalized Additive Models (GAMs). The result showed that the distribution of small pelagic fish tends to be within the area of temperature ranging from 29.5 to 30.0oC, the chlorophyll-a from 0.7 to 0.9 mg.m-3 and concentrated within the coastal area with in waters depth maximum of 100 m.Keywords: Oceanography, small pelagic fish, distribution, fishing ground, Gulf of Bone

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ZOOPLANKTON COMMUNITY IN LAMALERA SEA AND SAWU SEA, EAST NUSA TENGGARA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v5i1.7770 ◽

2013 ◽

Vol 5 (1) ◽

Author(s):

Nurul Fitriya ◽

Muhammad Lukman

Keyword(s):

Spatial Distribution ◽

Community Structure ◽

Surface Water ◽

Marine Mammals ◽

Diversity Index ◽

Monsoon Season ◽

Zooplankton Community ◽

Fishing Ground ◽

Small Species ◽

North And South

Zooplankton community was studied in Lamalera Sea and Sawu Sea during DIKTI-P2O LIPI Expedition from 19 – 30 July 2011. Besides being a potential fishing ground, the Lamalera sea and Sawu Sea have been a migration path for Cetacean (large marine mammals), particularly during the southeast monsoon season. The purposes of this study were to investigate community structure, abundance, and spatial distribution of zooplankton in the Lamalera Sea and the Sawu Sea. Plankton samples were collected from 23 stations, by NORPAC 300 µm-net that was vertically hauled from maximum 200 meter depth up to the surface water. The result showed that there were 45 taxa of zooplankton, which was dominated by copepods . The abundance of the zooplankton between 491 - 4537 individu/m3. Average diversity index and evenness values were 1.59 ± 0.21 and 0.50 ± 0.04, respectively. In this area, Creel has been found in all research stations but the abundance was small. Species composition was relatively the same between sampling stations suggesting that there was no different in composition between north and south parts, which virtually comprise of different water masses. It showed that spatial distribution of zooplankton was relatively wide-reaching. Keywords: zooplankton, copepoda, creel, Lamalera sea, and Sawu Sea.

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Climate Change and Small Pelagic Fish

10.1017/cbo9780511596681 ◽

2001 ◽

Cited By ~ 48

Keyword(s):

Climate Change ◽

Pelagic Fish ◽

Small Pelagic Fish

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The box-balance model: a new tool to assess fish larval survival, applied to field data on two small pelagic fish

Marine Ecology Progress Series ◽

10.3354/meps13369 ◽

2020 ◽

Vol 650 ◽

pp. 289-308 ◽

Cited By ~ 2

Author(s):

V Raya ◽

J Salat ◽

A Sabatés

Keyword(s):

Field Data ◽

Fish Larvae ◽

Larval Growth ◽

Warming Trend ◽

Mortality Rates ◽

Larval Survival ◽

Pelagic Fish ◽

Balance Model ◽

Small Pelagic Fish ◽

Mesoscale Structures

This work develops a new method, the box-balance model (BBM), to assess the role of hydrodynamic structures in the survival of fish larvae. The BBM was applied in the northwest Mediterranean to field data, on 2 small pelagic fish species whose larvae coexist in summer: Engraulis encrasicolus, a dominant species, and Sardinella aurita, which is expanding northwards in relation to sea warming. The BBM allows one to quantify the contribution of circulation, with significant mesoscale activity, to the survival of fish larvae, clearly separating the effect of transport from biological factors. It is based on comparing the larval abundances at age found in local target areas, associated with the mesoscale structures (boxes), to those predicted by the overall mortality rate of the population in the region. The application of the BBM reveals that dispersion/retention by hydrodynamic structures favours the survival of E. encrasicolus larvae. In addition, since larval growth and mortality rates of the species are required parameters for application of the BBM, we present their estimates for S. aurita in the region for the first time. Although growth and mortality rates found for S. aurita are both higher than for E. encrasicolus, their combined effect confers a lower survival to S. aurita larvae. Thus, although the warming trend in the region would contribute to the expansion of the fast-growing species S. aurita, we can confirm that E. encrasicolus is well established, with a better adapted survival strategy.

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