scholarly journals Movements of female lumpfish (Cyclopterus lumpus) around Iceland

2014 ◽  
Vol 72 (3) ◽  
pp. 880-889 ◽  
Author(s):  
James Kennedy ◽  
Sigurður Þ. Jónsson ◽  
Jacob M. Kasper ◽  
Halldór G. Ólafsson
Keyword(s):  
Fisheries Management ◽  
Negative Relationship ◽  
Coastal Areas ◽  
Clear Pattern ◽  
Female Fish ◽  
Fishing Season ◽  
Cyclopterus Lumpus ◽  
Homing Behaviour

Abstract Lumpfish (Cyclopterus lumpus) migrate from their offshore feeding areas to the coastal areas of Iceland during March and April where they remain for several months before spawning. Their movements during this time are poorly documented. Using the results of an extensive tag-recapture study (the largest documented for lumpfish) which took place between 2008 and 2014, the movement of female lumpfish around Iceland was investigated and the implications for fisheries management were considered. Of 9710 female fish tagged, 880 were recaptured and 82 of these were recaptured after more than 250 days at liberty (DAL). There was a negative relationship between length at tagging and recapture rate indicating that between 2008 and 2014, the fishery was selecting for smaller fish. Lumpfish showed extensive movements with fish tagged in coastal areas being recaptured up to 587 km from their tagging location and were capable of swimming up to 49 km day−1. Fish were most frequently caught in the area in which they were tagged; however, movement between areas was common. There were indications of homing behaviour with 75% of the fish, which were recaptured after 250 DAL, caught within 80 km of their tagging location. Fish which were tagged offshore before the fishing season showed no clear pattern of where they would be recaptured. These extensive movements and homing behaviour are discussed in the context of the management of the lumpfish fishery.

scholarly journals POTENTIAL FISHING GROUND MAPPING BASED ON GIS HOTSPOT MODEL AND TIME SERIES ANALYSIS: A CASE STUDY ON LIFT NET FISHERIES IN SERIBU ISLAND

2017 ◽  
Vol 9 (1) ◽  
pp. 337-356
Author(s):  
Andi Alamsyah Rivai ◽  
Vincentius P. Siregar ◽  
Syamsul B. Agus ◽  
Hiroki Yasuma
Keyword(s):  
Time Series ◽  
Fisheries Management ◽  
Fishing Ground ◽  
Effective Management ◽  
Target Species ◽  
Fishing Activity ◽  
Fishing Season ◽  
Spatio Temporal ◽  
West Monsoon

Information on the spatial and temporal of fishing activity can optimize a fisheries management and increase their economical and biological benefit. For effective management and good understanding of fishing activities, information about fishing ground is crucial. In this study, we aimed to analyze the spatio-temporal of lift net fisheries in Kepulauan Seribu by analyzing their fishing season, investigating their hotspot of fishing ground using GIS-based hotspot model, and mapping the potential fishing ground of each target species. We found that anchovy and scad could be caught throughtout the year, while sardine and squid had high fishing season in west monsoon. Hotspot of fishing ground of lift net fisheries in Kepulauan Seribu waters generally was concentrated around Lancang Island and in southern part of Kotok Island. Potential fishing ground for sardines was located in around Lancang Island on west monsoon. Squids were highly distributed around Lancang Island in December to January and around Lancang and Rambut Islands in November. Anchovy and scad had more potential fishing ground in around Kepulauan Seribu waters.  Keywords: fishing ground, lift net, hotspot, fishing season 

scholarly journals Genome- and transcriptome-derived microsatellite loci in lumpfish Cyclopterus lumpus: molecular tools for aquaculture, conservation and fisheries management

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Simo N. Maduna ◽  
Adam Vivian-Smith ◽  
Ólöf Dóra Bartels Jónsdóttir ◽  
Albert K. D. Imsland ◽  
Cornelya F. C. Klütsch ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Microsatellite Loci ◽  
Molecular Tools ◽  
Cyclopterus Lumpus

Comment on: “Managing fisheries from space: Google Earth improves estimates of distant fish catches” by Al-Abdulrazzak and Pauly

2014 ◽  
Vol 71 (7) ◽  
pp. 1921-1926 ◽  
Author(s):  
Luca Garibaldi ◽  
Jennifer Gee ◽  
Sachiko Tsuji ◽  
Piero Mannini ◽  
David Currie
Keyword(s):  
Fisheries Management ◽  
Google Earth ◽  
National Data ◽  
Gulf Region ◽  
Fishing Season ◽  
National Statistics ◽  
Ground Validation ◽  
Catch Rates ◽  
The Impact ◽  
Adequate Ground

This Comment was prompted by the substantial difference in weir catch estimates in the Gulf between (i) those reported by Al-Abdulrazzak and Pauly (2014. Managing fisheries from space: Google Earth improves estimates of distant fish catches. ICES Journal of Marine Science, 71(3), 450–454), who used Google Earth to count weir numbers, and (ii) those available from official national statistics provided by two major weir fishing countries (Bahrain and Iran). Satellite imageries, including Google Earth, are powerful tools for collecting data on visible structures when verified with adequate ground validation. However, an extension of their contribution to improving overall catch estimates is rather limited without having solid information on daily catch, which will substantially differ according to time and area, and fishing season lengths. It was noted that Al-Abdulrazzak and Pauly (2013) introduced positive biases through their interpretation of Google Earth images and data treatment. They included several assumptions, such as removing the impact of poor visibility, correcting grids of low resolutions, estimating number of unseen weirs, and applying daily catch rates higher than referenced observed values. The overall extent of such potential positive bias could be more than six times that which we considered reasonable. This Comment also corrects misconceptions about “FAO catch data”, discusses other available national data, and introduces the existence of the Regional Commission for Fisheries (RECOFI), a mechanism for fisheries management in the Gulf region, and its recent activities to collect more complete catch and effort data separated by gear.

Predicting mobulid ray distribution in coastal areas of Lesser Sunda Seascape: Implication for spatial and fisheries management

2020 ◽  
Vol 198 ◽  
pp. 105328
Author(s):  
Mochamad Iqbal Herwata Putra ◽  
Edy Setyawan ◽  
Betty J.L. Laglbauer ◽  
Sarah Lewis ◽  
Dharmadi Dharmadi ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Coastal Areas

scholarly journals PHYTOPLANKTON IN HABITATES OF CEMPEDIC FISH (Osteochilus spilurus) IN LENGGANG RIVER, EAST BELITUNG

2018 ◽  
Vol 9 (2) ◽  
pp. 45-52
Author(s):  
Jeny Setiawan ◽  
Ardiansyah Kurniawan ◽  
Suci Puspita Sari ◽  
Andri Kurniawan ◽  
Yulian Fakhrurrozi
Keyword(s):  
Fisheries Management ◽  
Natural Habitat ◽  
Moderate Level ◽  
Fishing Season ◽  
Fish Catch ◽  
Quantitative Descriptive ◽  
Descriptive Method

Lenggang River in East Belitung regency becomes the natural habitat of Cempedik Fish (Osteochilus spilurus) which is an important economical plankton-feeder fish and has close to the culture of society. The production which still dependent of natural catch makes the description of phytoplankton can be the foundation in fisheries management and developing aquaculture of Cempedik Fish. This study aims to obtain a description of phytoplankton in Lenggang River using quantitative descriptive method. Phytoplankton sampling was conducted during the Cempedik Fishing season in December 2016 with four stations on the Lenggang River based on Cempedik Fish catching location. The abundance of phytoplankton showed values ​​between 3,710 - 8,676 individuals / liter and correlated with the location of Cempedik Fish catch. The dominant index of phytoplankton showed a low value (0.16-0.21) and the uniformity index at the moderate level (0.66 - 0.79) with the Bacillariophyceae Class having the highest dominance.

scholarly journals PENGARUH LAJU SEDIMENTASI TERHADAP REKRUTMEN KARANG DI TELUK KENDARI (The effect of sedimentation rate on coral recruitment in Kendari Bay)

2018 ◽  
Vol 24 (2) ◽  
pp. 73
Author(s):  
Subhan Subhan ◽  
La Ode Alirman Afu
Keyword(s):  
Coral Reefs ◽  
Sedimentation Rate ◽  
Sediment Trap ◽  
Negative Relationship ◽  
Coastal Areas ◽  
Sedimentation Rates ◽  
Coral Recruitment ◽  
Coefficient Corrélation ◽  
The Relationship

ABSTRAKSedimentasi secara terus menerus menjadi masalah utama terumbu karang di perairan pesisir. Sebanyak 7 titik pengambilan sampel telah dilakukan di Teluk Kendari selama periode Juni - Oktober 2015. Penelitian ini bertujuan membuktikan adanya pengaruh laju sedimentasi terhadap rekrutmen karang baik dalam sebaran kelompok taksa dan ukuran koloni juvenil karang. Pengambilan sampel dengan transek kuadrat mengunakan alat selam SCUBA dilakukan untuk memperoleh data tentang rekrutmen karang. Sedangkan pengukuran laju sedimentasi menggunakan metode sediment trap. Hubungan antara laju sedimentasi dengan rekrutmen karang dianalisis dengan menggunakan analisis regresi sederhana. Hasil penelitian menunjukkan adanya hubungan linier negatif antara laju sedimentasi dan rekrutmen karang yang ditunjukkan dengan nilai koefisien korelasi r = -0.941. ABSTRACTSedimentation constantly becomes the major problem for coral reefs in coastal areas. There were seven sampling stations carried out in Kendari Bay between June and October 2015. The purpose of the present study was to confirm the effect of sedimentation rate on coral recruitment in the level of genus and size of the colony of coral’s juvenile. Sampling was collected using quadrant transect method with the help of SCUBA to obtain data on coral recruitment, while the sedimentation rates were measured using sediment trap method. The relationship between sedimentation rates and coral recruitment was analysed using regression linear. The results showed that there was negative relationship between sedimentation rates and coral recruitment with the coefficient correlation (r) = -0.941.              

scholarly journals The Myth of the Stupid Believer: The Negative Religiousness–IQ Nexus is Not on General Intelligence (g) and is Likely a Product of the Relations Between IQ and Autism Spectrum Traits

2019 ◽  
Vol 59 (3) ◽  
pp. 1567-1579 ◽  
Author(s):  
Edward Dutton ◽  
Jan te Nijenhuis ◽  
Daniel Metzen ◽  
Dimitri van der Linden ◽  
Guy Madison
Keyword(s):  
Cognitive Abilities ◽  
Negative Relationship ◽  
Autism Spectrum ◽  
Large Datasets ◽  
General Intelligence ◽  
Clear Pattern ◽  
Religious Groups ◽  
Iq Scores ◽  
Meta Analyses ◽  
Different Levels

Abstract Numerous studies have found a negative relationship between religiousness and IQ. It is in the region of − 0.2, according to meta-analyses. The reasons for this relationship are, however, unknown. It has been suggested that higher intelligence leads to greater attraction to science, or that it helps to override evolved cognitive dispositions such as for religiousness. Either way, such explanations assume that the religion–IQ nexus is on general intelligence (g), rather than some subset of specialized cognitive abilities. In other words, they assume it is a Jensen effect. Two large datasets comparing groups with different levels of religiousness show that their IQ differences are not on g and must, therefore, be attributed to specialized abilities. An analysis of the specialized abilities on which the religious and non-religious groups differ reveals no clear pattern. We cautiously suggest that this may be explicable in terms of autism spectrum disorder traits among people with high IQ scores, because such traits are negatively associated with religiousness.

scholarly journals POTENTIAL FISHING GROUND MAPPING BASED ON GIS HOTSPOT MODEL AND TIME SERIES ANALYSIS: A CASE STUDY ON LIFT NET FISHERIES IN SERIBU ISLAND

2017 ◽  
Vol 9 (1) ◽  
pp. 337
Author(s):  
Andi Alamsyah Rivai ◽  
Vincentius P. Siregar ◽  
Syamsul B. Agus ◽  
Hiroki Yasuma
Keyword(s):  
Time Series ◽  
Fisheries Management ◽  
Fishing Ground ◽  
Effective Management ◽  
Target Species ◽  
Fishing Activity ◽  
Fishing Season ◽  
Spatio Temporal ◽  
West Monsoon

<p class="Paragraf"><em>Information on the spatial and temporal of fishing activity can optimize a fisheries management and increase their economical and biological benefit. For effective management and good understanding of fishing activities, information about fishing ground is crucial. In this study, we aimed to analyze the spatio-temporal of lift net fisheries in </em><em>Kepulauan Seribu</em><em> by analyzing their fishing season, investigating their hotspot of fishing ground using GIS-based hotspot model, and mapping the potential fishing ground of each target species. We found that anchovy and scad could be caught throughtout the year, while sardine and squid had high fishing season in west monsoon. Hotspot of fishing ground of lift net fisheries in </em><em>Kepulauan Seribu</em><em> waters generally was concentrated around Lancang Island and in southern part of Kotok Island. Potential fishing ground for sardines was located in around Lancang Island on west monsoon. Squids were highly distributed around Lancang Island in December to January and around Lancang and Rambut Islands in November. Anchovy and scad had more potential fishing ground in around </em><em>Kepulauan Seribu</em><em> waters. </em></p><p class="Paragraf"><em> </em></p><p class="Paragraf"><strong><em>Keywords</em></strong><em>: </em><em>fishing ground</em><em>, </em><em>lift net, hotspot, fishing season </em></p>

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