The effect of predation on artificial reef juvenile demersal fish species

Efforts to maintain and prepare the fish stock availability, coastal resources management in Malalayang Dua waters was carried out through coral reef rehabilitation in public fisheries zone, artificial reef “BambooReef” placement as an effort of innovation creation to prepare an alternative artificial reef model. In 1 -2 years, new habitat is expected to be present, could increase the fish biomass, and create the area to be able to supply reef fish stock in Malalayang Dua waters and its surroundings.The artificial reef “bambooReef” was laid around the natural coral reefs at the depth of 5 to 7 m. Data collected were presence and attraction of the coral fish (no. species and density).Results showed that there were 15 species found around the “BambooReef”, with the highest recorded as mayor species group (13 species), followed by indicator species, and 1 target species. Total number was 137 individuals and the density was 8.56 ind./m2 or 85.625 ind/ha. The fifteen species of coral fish did not, in general, belong to optimum size for fishing. Nevertheless, this study reflects that the artificial reef placement has created new habitat for the coral fish. Keywords: Artificial reef, bambooreef, bamboo, demersal. AbstrakUpaya untuk menjaga, memelihara dan sekaligus mempersiapkan penyediaan stok ikan di perairan, dibuatkan pengelolaan sumberdaya wilayah pesisir di Kelurahan Malalayang Dua dengan konsep pengelolaan melalui perbaikan kondisi terumbu karang zona perikanan masyarakat, dengan konsep rehabilitasi tempat hidup dan berkembang ikan yaitu peletakan terumbu buatan dari bahan dasar bambu “BambuReef”, sebagai upaya menciptakan inovasi bahkan menciptakan model terumbu buatan alternatif (baru). Diharapkan dalam waktu dalam waktu 1-2 Tahun akan tercipta habitat baru, meningkatkan biomassa ikan, menciptakan daerah yang dapat menyediakan stock ikan karang di perairan pantai Kelurahan Malalayang Dua dan sekitarnya.Terumbu buatan “bambooReef” diletakkan pada daerah sekitar terumbu karang alami di perairan pesisir Malalayang Dua Kota Manado, pada kedalaman 5 s/d 7 meter. Data yang diperoleh dari peletakkan/penerapan terumbu buatan “BambooReef” adalah kehadiran dan ketertarikan jenis ikan karang (jumlah jenis dan kepadatannya),Hasil penelitian menunjukkan bahwa ada 15 spesies yang ditemukan di sekitar terumbu buatan “BambooReef” dimana tertinggi termasuk pada kelompok spesies mayor (13 jenis), kemudian diikuti spesies indikator berjumlah 1 jenis, dan spesies target 1 jenis, dengan jumlah 137 individu, serta kepadatan 8,56 indv/m2 atau sebesar 85.625 individu per hektar. 15 jenis ikan karang yang ditemukan umumnya belum dalam ukuran optimum untuk ditangkap. Namun demikian hasil penelitian ini menunjukkan bahwa penempatan terumbu buatan telah memberikan habitat baru bagi ikan karang.Kata kunci: Terumbu buatan, bambooreef, bambu, demersal.

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Demersal fish assemblages and habitat characteristics on the continental shelf and upper slope of the north-western Mediterranean

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400003040 ◽

2000 ◽

Vol 80 (6) ◽

pp. 981-988 ◽

Cited By ~ 59

Author(s):

Montserrat Demestre ◽

Pilar Sánchez ◽

Pere Abelló

Keyword(s):

Continental Shelf ◽

Fish Species ◽

Fish Assemblages ◽

Demersal Fish ◽

Western Mediterranean ◽

Habitat Characteristics ◽

Species Assemblages ◽

The North ◽

Benthic Sediments ◽

Upper Slope

Continental shelf and upper slope fish communities were studied along the Catalan coast based on 66 experimental bottom otter trawls. A total of 79 demersal fish species were studied by means of cluster analysis and multi-dimensional scaling (MDS) ordination for community structure. Analysis revealed the existence of five major location clusters. Similarity percentage analysis (SIMPER) was determined by comparing the dissimilarity between two groups of samples using the discriminating species. Geomorphological characteristics, bottom substratum and depth showed direct influences on species assemblages. High correlation between the biotic data samples and depth was observed. The fish species assemblages identified five main demersal fish associations which corresponded with the five location clusters and with five benthic sediments (mud of the upper slope, sand and gravel, mud of the shelf, muddy-sand and sand with rocky outcrops).

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Subtidal assemblages associated with a geotextile reef in south-east Queensland, Australia

Marine and Freshwater Research ◽

10.1071/mf04202 ◽

2005 ◽

Vol 56 (2) ◽

pp. 133 ◽

Cited By ~ 17

Author(s):

Rhys A. Edwards ◽

Stephen D. A. Smith

Keyword(s):

Fish Assemblages ◽

Benthic Communities ◽

Artificial Reef ◽

Demersal Fish ◽

Diverse Range ◽

Marine Habitats ◽

Sessile Invertebrates ◽

Hard Structures ◽

Asymmetrical Design ◽

Natural Reefs

In marine habitats, the use of geotextile materials as a ‘soft-engineering’ solution is increasingly being considered as an alternative to hard structures. However, very little is known about biological assemblages that develop on geotextile structures. This study provides the first ecological comparison of subtidal assemblages between Narrowneck Artificial Reef (NAR), a geotextile reef in south-east Queensland, Australia, and three nearby natural reefs. Benthic community structure, fish assemblages and habitat complexity were compared between reef types using an asymmetrical design. Although natural reefs supported distinct biotic assemblages, as a class, these reefs differed significantly from NAR. The artificial reef was dominated by macroalgae and supported fewer benthic categories, whereas the natural reefs were characterised by a diverse range of sessile invertebrates. Benthic and demersal fish assemblages were less diverse on NAR, but pelagic fish assemblages were similar on both reef types. The substratum of NAR was less complex than that of the natural reefs; this physical variable was correlated with some of the differences in benthic communities and benthic and demersal fish assemblages. It is likely that the key determinants of the biotic patterns observed in this study are interactions between the age of NAR and the physical properties of geotextile substratum.

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Diel feeding periodicity and daily ration of shelf break fish species

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315406013798 ◽

2006 ◽

Vol 86 (4) ◽

pp. 853-860 ◽

Cited By ~ 10

Author(s):

P. Carpentieri ◽

F. Colloca ◽

A. Belluscio ◽

A. Criscoli ◽

G.D. Ardizzone

Keyword(s):

Fish Species ◽

Fish Habitat ◽

Setting Time ◽

Demersal Fish ◽

Reproductive Period ◽

Daily Ration ◽

Daily Consumption ◽

Central Mediterranean ◽

High Productivity ◽

Feeding Periodicity

The evaluation of the daily ration and feeding periodicity in a Mediterranean demersal fish assemblage under natural conditions is presented. Data were obtained during four trawl surveys conducted on the shelf-edge of the central Mediterranean Sea. Recently, researchers have begun to consider this area an essential fish habitat due to its extremely high productivity and diversity. The species which typified the assemblage were the fish Macroramphosus scolopax, Lepidotrigla cavillone, Mullus barbatus, Serranus hepatus, Argentina sphyraena and Glossanodon leioglossus. Fish were collected at three hour intervals throughout four 24 h sampling periods representing annual seasons. The study was based on the analysis of catch data and stomach fullness per setting time. Results show significant variation of feeding periodicity among species within daytime. The amount of food consumed daily, calculated according to the Elliott & Persson model, is compared to the patterns reported in literature for Atlantic fish species with similar trophic habits. Higher values of daily consumption could be related to the reproductive period for most of the above mentioned species.

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