Interaction Between Marine Fauna and the Small Pelagic Fishery in the Coastal Environment of the Gulf of California, Mexico

The first steps have been taken to analyze the effects of small pelagic harvests on the Gulf of California ecosystem. The primary goal of this study was to estimate the latitudinal differences in regionalized baselines of endangered and threatened marine species attracted to a purse seine in a Mexican fishery of small pelagic fish. We also analyzed the spatial patterns in fishing effort in the Gulf of California. Seven zones were analyzed in the Gulf of California, including the east and west coasts, and a total of 3,051 fishing sets were analyzed during January 2013 and July 2014; the data provided a comprehensive picture of the distribution of the fishing effort, small pelagic fishes harvested, and the presence of species attracted to the fishing sets. The region in the upper Gulf of California showed a low presence of individuals, and the east coast recorded more sightings than the west coast; consequently the fishing effort was mainly distributed in the east coast. The number of individuals for several species sighted and counted by fishing set was used for each zone in the Gulf of California, and a conservative baseline based on the Pennington estimator was computed. It provided an average value of endangered and threatened marine species attracted to a purse seine for each zone. The Pennington estimator is recommended due to the precision of the confidence intervals and the nature of the uncertainty in the data collection based on sightings.

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MODEL BIOEKONOMI EKSPLOITASI MULTISPESIES SUMBER DAYA PERIKANAN PELAGIS DI PERAIRAN SELAT BALI (Bio-economic Model of Multispecies Exploitation of Pelagic Fishery Resources in the Bali Strait)

Marine Fisheries Journal of Marine Fisheries Technology and Management ◽

10.29244/jmf.2.2.141-154 ◽

2013 ◽

Vol 2 (2) ◽

pp. 141

Author(s):

N. Zulbainarni ◽

M. Tambunan ◽

Y. Syaukat ◽

A. Fahrudin

Keyword(s):

Key Words ◽

Economic Efficiency ◽

Economic Model ◽

Analytical Methods ◽

Fishing Effort ◽

Purse Seine ◽

Fishery Resources ◽

Optimal Value ◽

Pelagic Fishery ◽

Purse Seine Fishery

Bali Strait has potential abundance of pelagic fishery resources such as Indonesian oil sardine (lemuru), frigate mackerel (tongkol), scad mackerel (layang), short-bodied mackerel (kembung) and others which can be caught mostly using purse seine. Fishery resources are combined and also known asmultispecies; therefore this research aimed to analyze the model of bio-economic multispecies exploitation of pelagic fishery resources in Bali Strait. The analytical methods that used in this research were estimated dynamic model of Walters and Hilborn (1976) and analysis of bio-economic model. The results showed that actual production of exploitation of pelagic fishery resources in Bali Strait, was lower than the rate of sustainable production especially Indonesian oil sardine and short-bodied mackerel. Production and fishing effort were below the actual optimal value. The management of pelagic fishery resources in Bali Strait did not show a good level of economic efficiency. Thus the exploitation of pelagic fishery resources in Bali Strait using purse seine could still be increased.Key words: bio-economic, multispecies, optimal

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STATUS OF SMALL PELAGIC FISHERY IN THE MAKASSAR STRAIT BASED AT THE NORTHERN PART OF JAVA

Indonesian Fisheries Research Journal ◽

10.15578/ifrj.22.1.2016.9-16 ◽

2016 ◽

Vol 22 (1) ◽

pp. 9

Author(s):

Sri Turni Hartati ◽

Setiya Triharyuni ◽

Lilis Sadiyah

Keyword(s):

Fishing Effort ◽

Maximum Sustainable Yield ◽

Pelagic Fish ◽

Catch Rate ◽

Purse Seine ◽

Sustainable Yield ◽

Small Pelagic Fish ◽

Landing Sites ◽

Pelagic Fishery ◽

Pelagic Fisheries

The coastal of Makassar Strait is one of main fishing grounds for purse seine vessels from northern part of Java which based at the following landing sites, i.e. Pekalongan, Tegal and Juwana. The purse seine fishery predominantly targets small pelagic fish. This paper attempts to present the current condition of small pelagic fishery in the Makassar Strait. Catch and effort (trip) data between 2004 and 2011 from the three landing sites were used to estimate Maximum Sustainable Yield (MSY) using Schaefer & Fox models. The results showed a decreasing trend in the catch rate, from 30.83 tons/trip in 2004 to 12.27 tons/trip in 2011. The estimated MSY is at the range of 34,705- 37,930 tons with optimum efforts for 2,234-2,500 purse seine trips. Thus the level of purse seine fishing effort in 2011, i.e. 3,078 trips, was exceeding the optimum effort. The decreasing trend in the catch rate may indicate overfishing is occurring between 2004 and 2011. For management of the small pelagic fisheries in the waters of Makassar Strait, important action recommended is fishing effort restrictions. The effort allowed would be only in the range of 2,234-2,500 purse seine trips, and the fishing capacity needs to be controled.

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Fishing on floating objects (FOBs): how French tropical tuna purse seiners split fishing effort between GPS-monitored and unmonitored FOBs

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/cjfas-2017-0152 ◽

2018 ◽

Vol 75 (11) ◽

pp. 1849-1858 ◽

Cited By ~ 2

Author(s):

Julia E. Snouck-Hurgronje ◽

David M. Kaplan ◽

Emmanuel Chassot ◽

Alexandra Maufroy ◽

Daniel Gaertner

Keyword(s):

Search Time ◽

Fishing Effort ◽

Purse Seine ◽

Trajectory Data ◽

Catch Per Unit Effort ◽

Position Information ◽

Foreign Objects ◽

Tropical Tuna ◽

Floating Objects ◽

Over Time

Fishing on floating objects (FOBs) dominates catch in tropical tuna purse seine fisheries. One frequently cited advantage of deploying GPS-monitored FOBs is that the position information can be used for directed fishing to reduce search time for tuna. However, purse seiners also fish on foreign objects for which position information is not available. It is critical to quantify the prevalence of fishing on GPS-monitored versus unmonitored FOBs to understand how they impact fishing effort and catch per unit effort. We analyzed French commercial, observer, and FOB trajectory data in the Atlantic and Indian oceans to determine how often purse seine vessels fish on GPS-monitored FOBs. Only 2.7%–20.4% of French FOB fishing sets over 2007–2013 in both oceans were made on GPS-monitored FOBs. Though increasing over time, the low percentage suggests that French vessels do not primarily use GPS-monitored FOBs to reduce search time for tuna. We hypothesize that fishery-wide FOB deployments have important collective consequences for overall fishing effort and recommend that future effort metrics should be based on fishery-wide FOB activities.

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Analysis of crab size structure and the fishing effort applied to a crab fishery in northwest Mexico

Crustaceana ◽

10.1163/15685403-00003769 ◽

2018 ◽

Vol 91 (2) ◽

pp. 225-237 ◽

Cited By ~ 2

Author(s):

César A. Heredia-Delgadillo ◽

Guillermo Rodríguez-Domínguez ◽

Raúl Pérez-González ◽

Nicolás Castañeda-Lomas ◽

Sergio G. Castillo-Vargasmachuca ◽

...

Keyword(s):

Gulf Of California ◽

Size Structure ◽

Coastal Lagoons ◽

Low Frequency ◽

Fishing Effort ◽

Double Ring ◽

Northwest Mexico ◽

Fishing Gears ◽

Fishery Cooperatives ◽

Ring Net

The fishing effort of a Sinaloa crab fishery in the Gulf of California in 2014 was analysed based on fishermen’s interviews, official catches and permits, and information from a sample of fishing logbooks from five fishery cooperatives operating in four coastal lagoons that contained the daily catch from individual fishing trips. Unauthorized gear, a double-ring net (DR), was used most frequently (>70% of the fishers) for crab fishing, although authorized single-ring nets and Chesapeake traps (CT) were also used with low frequency. The estimated fishing effort was 641 boats/day in the four coastal lagoons, which was 34% more than authorized, and 818 boats/day were employed in all of Sinaloa. A total of 57 479 fishing gears were estimated for the study area, which was 49.9% greater than the maximum authorized number, and 80 822 nominal fishing gears were estimated for the entire Sinaloa crab fishery, 14.15% more than the total gear limit (70 800). The size of the mesh used in the gear was smaller than the authorized limit of 76 mm, and >50% of the catches included crabs of unlawful size. It is argued that the effort must be regulated in terms of the number of vessels, per unit time, and not the number of gears. The information from this study demonstrates a failure to monitor compliance with current regulations and thus means that other strategies for the sustainable management of the fishery, such as co-management, should be tested.

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Methodology for environmental impact assessment of underwater noise on marine mammals

The APPEA Journal ◽

10.1071/aj10030 ◽

2011 ◽

Vol 51 (1) ◽

pp. 467

Author(s):

Dick Petersen ◽

Antoine David ◽

Darren Jurevicius

Keyword(s):

Oil And Gas ◽

Sound Propagation ◽

Underwater Acoustics ◽

Oil And Gas Industry ◽

Marine Species ◽

Marine Ecology ◽

Underwater Sound ◽

Underwater Noise ◽

Mammal Species ◽

Marine Fauna

The oil and gas industry uses some exploration and production technologies that produce high levels of underwater sound, such as seismic surveys, underwater blasting for demolition and construction, and offshore piling. These underwater noise sources have the potential to impact marine species, which are usually reliant on sound instead of light as their primary sense for communication and sensing their environment. Regulatory interest in minimising the impacts of underwater noise on marine fauna is increasing. This paper presents a methodology for assessing these environmental impacts, with particular focus on cetaceans (whales and dolphins) and pinnipeds (seals and sea lions), although it can easily be adapted to other marine mammal species and fishes. It requires input from a variety of fields, such as: underwater acoustics for sound propagation modelling and source noise characterisation; marine bio-acoustics for determining the effects of sound on marine species’ hearing and communication; and marine ecology for identifying the marine species that may be affected and assessing the biological importance of noise-affected marine areas. These inputs are used in a risk assessment to assess the likely impacts of underwater noise on marine species, which is a collaborative effort by specialists in the fields of underwater acoustics, marine bio-acoustics and marine ecology.

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Fungi on Juncus roemerianus. 11. More new ascomycetes

Canadian Journal of Botany ◽

10.1139/b98-008 ◽

1998 ◽

Vol 76 (3) ◽

pp. 467-477 ◽

Cited By ~ 4

Author(s):

Jan Kohlmeyer ◽

Brigitte Volkmann-Kohlmeyer ◽

Ove E Eriksson

Keyword(s):

Salt Marshes ◽

East Coast ◽

Marine Fungi ◽

Marine Species ◽

Juncus Roemerianus ◽

The U.S

Anthostomella atroalba sp.nov., Phaeosphaeria roemeriani sp.nov., and Rivilata ius gen. et sp.nov. are described from the endemic needlerush, Juncus roemerianus Scheele, in salt marshes of the U.S. east coast. Phaeosphaeria roemeriani is an obligate marine species growing in the base of the plant, whereas A. atroalba and R. ius can be considered terrestrial, because they develop exclusively in the upper, not inundated, part of the leaves. Rivilata, a member of Saccardiaceae, is compared with representatives of Phillipsiella and Schizothyrium.Key words: Anthostomella, Juncus, marine fungi, marsh, Phaeosphaeria, Rivilata.

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Macrofauna inhabiting the sponge Paraleucilla magna (Porifera: Calcarea) in Rio de Janeiro, Brazil

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315412001804 ◽

2013 ◽

Vol 93 (4) ◽

pp. 889-898 ◽

Cited By ~ 16

Author(s):

André Padua ◽

Emilio Lanna ◽

Michelle Klautau

Keyword(s):

Community Composition ◽

Rio De Janeiro ◽

Native Species ◽

Diversity Index ◽

Marine Fauna ◽

Pregnant Females ◽

Animal Phyla ◽

Previous Proposal ◽

One Year ◽

Number Of Individuals

Sponges (phylum Porifera) are important components of the benthic marine fauna known for their interactions with vertebrates and a large number of invertebrates seeking for food, shelter or substrate for attachment. Studies on this subject, however, were restricted only to the macrofauna inhabiting sponges of the class Demospongiae. In the present work, we describe the macrofauna associated with a calcareous sponge in Brazil, Paraleucilla magna. Individuals of this allegedly non-native species were monthly collected during one year in Rio de Janeiro (Brazil). Fifty-one taxa representing ten animal phyla were found associated with P. magna. The most frequent and abundant taxa were Crustacea, Mollusca, Polychaeta and Bryozoa, while echinoderms, cnidarians, ascidians, nemerteans, platyhelminthes and sponges were less frequent or even rare and less abundant. Juveniles of several taxa and pregnant females of Crustacea were found associated with P. magna, but these associations were not exclusive. The macrofauna associated with P. magna did not present a clear seasonality, although it was possible to observe a change in the community composition alongside the year. The volume of the sponges was significantly related to the diversity index (H′) and number of taxa, but not with evenness (J′) and number of individuals. Our results show that P. magna is used as a substrate for attachment and/or shelter by its associates and that most of these associations are just opportunistic. The data presented here reiterate a previous proposal that sponges are important biodiversity reservoirs and that they should be seriously considered in conservation programmes.

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POTENSI LESTARI IKAN SELAR KUNING (Selaroides leptolepis) DI PERAIRAN SELAT SUNDA (Population Dynamics of Yellowstripe Scad (Selaroides leptolepis) in Sunda Strait)

Marine Fisheries Journal of Marine Fisheries Technology and Management ◽

10.29244/jmf.5.1.101-108 ◽

2016 ◽

Vol 5 (1) ◽

pp. 101 ◽

Cited By ~ 2

Author(s):

Maizan Sharfina ◽

Mennofatria Boer ◽

Yunizar Ernawati

Keyword(s):

Economic Value ◽

Fishing Effort ◽

Maximum Sustainable Yield ◽

Growth Patterns ◽

Purse Seine ◽

Sustainable Yield ◽

Market Demand ◽

Salted Fish ◽

Frozen Fish ◽

The One

ABSTRACT Yellowstripe scad included the one of commodity that has an important economic value in the Sunda Strait. Commonly, this species processed by Pandeglang fishermen to be the boiled fish, salted fish, grilled fish, besides it also traded in fresh or frozen fish product. The high market demand can not offset the production of this species from the nature. Therefore, it needed an information about resources of yellowstripe scad in the waters of the Sunda Strait in order to manage it well. The objective of this study was to estimate the maximum sustainable yield (MSY) and the optimum fishing effort (fopt), so that the yellowstripe scad resources in the waters of the Sunda Strait can be utilized optimally and sustainably. Based on the standardization analysis, the purse seine be made the standard fishing gear for estimating the MSY of yellowstripe scad. The yellowstripe scad growth patterns during the study is isometric. Trends of CPUE of the yellowstripe scad fisheries tends to decrease during 2003 to 2013. Then, this species was estimated its maximum sustainable yield (MSY) of 304.50 tons per year, with the optimum fishing effort of 12.478 trips per year. The decline of the catch per fishing effort can indicated that the yellowstripe scad fishing conditions in the Sunda Strait was having the overfishing phenomenon. Key words: Sunda Strait, sustainable potential, yellowstripe scad-------ABSTRAK Ikan selar kuning termasuk salah satu komoditas perikanan yang memiliki nilai ekonomis penting di perairan Selat Sunda. Jenis ikan ini, selain banyak dimanfaatkan oleh nelayan sekitar Kabupaten Pandeglang sebagai ikan pindang, ikan bakar, ikan asin, juga diperdagangkan dalam keadaan segar maupun dibekukan. Tingginya permintaan pasar tidak dapat mengimbangi produksi ikan tersebut di alam. Oleh karena itu, untuk memperoleh informasi mengenai tingkat pemanfaatan sumber daya ikan selar kuning di perairan Selat Sunda, diperlukan suatu kajian mengenai potensi lestari ikan selar kuning. Tujuan dari penelitian ini adalah untuk mengetahui hasil tangkapan maksimum lestari (maximum sustainable yield atau MSY) serta upaya penangkapan maksimum lestari (fopt) sehingga sumberdaya ikan selar kuning di Perairan Selat Sunda dapat dimanfaatkan secara optimal dan berkelanjutan. Berdasarkan hasil standardisasi, alat tangkap standart yang digunakan adalah purse seine. Pola pertumbuhan ikan selar kuning selama penelitian, yaitu isometrik. Hasil perhitungan CPUE menunjukkan adanya produksi yang cenderung menurun dengan upaya penangkapan yang meningkat dari tahun 2003 sampai 2013. Hasil perhitungan potensi hasil tangkapan maksimum lestari (MSY) diestimasi sebesar 304,50 ton per tahun, dan upaya penangkapan optimumnya adalah 12.478 trip per tahun. Penurunan hasil tangkapan per upaya penangkapan dapat dijadikan salah satu indikasi bahwa kondisi penangkapan ikan selar kuning di Perairan Selat Sunda sedang mengalami gejala lebih tangkap atau overfishing. Kata kunci: Selat Sunda, potensi lestari, ikan selar kuning

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RESPONSIBLE FISHERIES MANAGEMENT OF MINI PURSE SEINE IN THE LAMPUNG BAY AREA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v8i2.15837 ◽

2017 ◽

Vol 8 (2) ◽

pp. 713-728

Author(s):

Yulia Estmirar Tanjov ◽

Roza Yusfiandayani ◽

. Mustaruddin

Keyword(s):

Fishing Effort ◽

Maximum Sustainable Yield ◽

Pelagic Fish ◽

Purse Seine ◽

Sustainable Yield ◽

Catch Per Unit Effort ◽

Small Pelagic Fish ◽

Bay Area ◽

Fisheries Resources ◽

The Status

Lempasing is a Coastal Fishing Port (CFP) which located in Bandar Lampung. It is one of the centers of fisheries activities in the city. One of the fishing gear which operated by most of fishermen in Lempasing is mini purse seine. Mini purse seine fishing activities in the Lampung Bay Area and Lempasing CFP is not in accordance with the conditions of the surrounding waters area. The research was conducted in the Lampung Bay Area and Lempasing CFP, Lampung. This study aims to: 1) determine the status of fisheries resources utilization, 2) to describe the dominant fish caught by mini purse seine. Analysis methods were used in this study namely: 1) Fishing Power Index (FPI), Catch Per Unit Effort (CPUE), and Maximum Sustainable Yield (MSY) to determine the status of fisheries resource utilization. The dominant small pelagic fishes caught were scad fish Selaroides sp., mackerel fish Rastrelliger sp., longnose trevally fish Carangoides chrysophrys. The result showed that Fox model was the best fits models with estimated maximum sustainable yield of 15.5 ton and fishing effort of 992 trip/year for mini purse seine. The longnose trevally fish in lampung bay area in do not exceeded the optimal catch fish condition can be used to sustainably. In these condition is necessary to wisely manage and setting the catches to not exceed the allowable catch of the small pelagic fish, so the stock of small pelagic fish in the Lampung Bay Area can be used sustainably.

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CRUSTACEOS DECAPODOS DEL PACIFICO COLOMBIANO: LISTA DE ESPECIES Y CONSIDERACIONES ZOOGEOGRAFICAS

Bulletin of Marine and Coastal Research ◽

10.25268/bimc.invemar.1992.21.0.418 ◽

2016 ◽

Vol 21 ◽

Author(s):

Rafael Lemaitre ◽

Ricardo Alvarez León

Keyword(s):

Gulf Of California ◽

Pacific Coast ◽

Marine Species ◽

Eastern Pacific ◽

Nominal Species ◽

Review Of The Literature ◽

Tropical Eastern Pacific ◽

The Pacific ◽

History Of ◽

The Caribbean

The Pacific coast of Colombia has been poorly explored, and its fauna is one of the least known in the tropical eastern Pacific. Although knowledge of the decapod fauna from this coast has recently increased, the information is scattered in numerous sources. A review of the literature showed that 378 decapods have been reported from this coast, including the islands of Gorgona and Malpelo. The numbers of species are distributed as follows; Dendrobranchiata, 18; Caridea,79; Thalassinidea, 13; Palinura, 6; Anomura, 61; and Brachyura, 201 .Twenty-seven species are known exclusively from the Colombian coast, three of which are endemic to the islands of Malpelo or Gorgona. A list of nominal species is presented, including information on distribution, important references, and synonyms under which the taxa have been reported for this coast. A summary of the history of explorations of the Pacific coast of Colombia as it relates to decapods, is presented. Zoogeographic affinities are briefly discussed for the marine species based on published distributions. Affinities are greatest with the Gulf of California (51.8%), followed by the Galápagos (28.6%), the Indo-Pacific (8.8%), and the Caribbean- Atlantic (7.7%).

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