Introduction

Kai, Yoshiaki; Hiroyuki, Motomura,; Matsuura, Keiichi

doi:10.1007/978-981-16-7427-3_1

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…One region comprised all areas both temperate and tropical zones (areas with tropical zones hereafter); the other region comprised only temperate zones. This is because other studies have shown a biogeographic boundary due to the Kuroshio Current (Kai et al, 2022), and our results also show a boundary of genetic differences between temperate and tropical zones for several coral species. The values of each indicator were ranked as low, middle, or high, in accordance with the EBSA selection process by the calculation described in Yamakita et al (2015).…”

Section: Potential Indicators and Proposed Important Marine Areassupporting

confidence: 82%

Consideration of Genetic Structure in the Ecologically or Biologically Significant Marine Areas Criteria: A Review of Convention on Biological Diversity Regional Workshops and A Case Study of Coral Reef Conservation Planning

et al. 2022

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In this study we reviewed the use of genetic information in the Ecologically or Biologically Significant Marine Areas (EBSA) of Convention on Biological Diversity (CBD). We also evaluated genetic indicators for each criterion of important marine areas. We proposed five genetic indices, mainly based on microsatellite analysis (e.g., private allele frequency and number of cryptic species), then selected EBSAs in tropical and temperate zones of Japan based on eight coral species as a case study. Finally, we compared the results with the findings from conventional species-based EBSAs. In the EBSAs genetic information was mainly used in the Northern Hemisphere, particularly in the Baltic Sea; it was rarely applied in the Southern Hemisphere and Asian regions. Although typically applied to large organisms, genetic information is used to various organisms, including benthic and bacterial communities. Genetic data are used as indicators of diversity and endemism. Genetic indices were available for all seven EBSA criteria, but only five indices of three criteria were used. Examination of important areas of corals in the temperate zone using these indices showed that the indices without genetic indicators extracted a large number of important areas in the tropics; however, the use of genetic indicators identified important locations, including in temperate zones. Comparison with conventional, mainly species-based non-genetic methods showed less than 50% agreement, although particularly important sites in marine protected areas were identified by both methods. While there is still more work to be done, such as consideration of the number of survey sites or target species, one reason is that species-based methods tend to evaluate tropical areas higher. Therefore, these genetic indices are useful for examining important regions, particularly in temperate zones; they revealed cryptic lineages, indicating that many unknown marine taxa should be considered in vulnerable marine areas. Some indicators could be extracted with additional effort, such as population size estimation, immigration, or the use of next-generation sequencing, thus guiding future studies. Because limited genetic information was available in the early stages of EBSA selection, there is a need for systematic surveys and evaluations, particularly in the Southern hemisphere, Asian region, and in small organisms.

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Section: Potential Indicators and Proposed Important Marine Areassupporting

confidence: 82%

Consideration of Genetic Structure in the Ecologically or Biologically Significant Marine Areas Criteria: A Review of Convention on Biological Diversity Regional Workshops and A Case Study of Coral Reef Conservation Planning

et al. 2022

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“…However, in recent years, a northward shift of the species’ nursery habitat has been reported in the western North Atlantic Ocean which is the transitional zone between temperate and subtropical latitudes, associated with increased water temperature and salinity (Bangley et al ., 2018). Miyazaki Prefecture has a north–south open coast, defined as a warm-temperate latitude (Nishimura, 1992; Kai and Motomura, 2022), facing the Pacific Ocean, with the warm Kuroshio Current flowing offshore (Murase et al ., 2017; Miki et al ., 2018). However, the distance of the coast from the Kuroshio Current increases northward (Murase, 2020), resulting in a lower sea surface temperature off the northern coast of the prefecture (Akazaki et al ., 2010; Murase et al ., 2017).…”

Section: Discussionmentioning

confidence: 99%

Photographic evidence from a recreational angler of the northernmost record of the bull shark Carcharhinus leucas (Elasmobranchii: Carcharhinidae) in the western Pacific Ocean

Ogata,

Murase

2023

J. Mar. Biol. Ass.

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Photographs of a single shark specimen (1040 mm in total length) caught in the Oyodo River estuary, Miyazaki Prefecture, Kyushu, Japan, by a recreational angler and uploaded to the social networking service Facebook, were identified as a juvenile specimen of the bull shark Carcharhinus leucas. The photographic record, now deposited in the Kanagawa Prefectural Museum of Natural History collection, represents the northernmost record of this species in the western Pacific Ocean. Although C. leucas is known to utilize primarily tropical estuarine habitats as nursery grounds, a few reports exist regarding the utilization of subtropical and warm-temperate latitude estuaries, as in this case. From the perspectives of species conservation and shark-bite mitigation in warm-temperate latitudes, further information on C. leucas occurrence around its northern distribution limit is required.

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“…The many islands of the Japanese archipelago that spread across 3000 km of latitude (20-46 • N) have a diverse fauna of freshwater and marine fishes, because of their phylogeographic history and location in relation to ocean currents, such as the Kuroshio Current [1]. The fish fauna of Japan includes 4476 valid species, which is 12% of the world's ichthyofauna [2].…”

Section: Introductionmentioning

confidence: 99%

Environmental DNA Characterization of the Fish Species Composition in the Mukawa River and Adjacent Habitats

Ahn,

Miller

2024

Fishes

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The diverse freshwater fish fauna of the Japanese archipelago is distributed among four main island landmasses, which include Hokkaido in the north, with many diadromous species. One relatively well-preserved river drainage along the southern coast of Central Hokkaido is the Mukawa River. Fish fauna surveys in the Mukawa River were mostly in downstream areas and the fish diversity is not well-documented among the upper, lower river, and coastal environments. Fish communities in the river, estuary, and sea were sampled using eDNA analysis to evaluate upstream and downstream species detections, and tidal and spatial detection variation near the river mouth. The number of species was higher at the river mouth and nearshore sites compared to the river and offshore. Fish detections reflected life history categories (freshwater resident, diadromous, brackish, or marine) and the environments. Similarity analysis showed that fish species compositions were divided into (1) upstream and midstream, (2) downstream and river mouth, (3) adjacent shore, and (4) offshore. Salmonid, cyprinid, loach, and sculpin species were detected in the river, compared to a mixture of species downstream and along the coast. This rapid assessment type study demonstrated that eDNA survey methodology would be effective for multiple river comparative surveys, seasonality studies, or evaluating possible effects of cross-river weirs or dams.

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Introduction

Cited by 3 publications

References 3 publications

Consideration of Genetic Structure in the Ecologically or Biologically Significant Marine Areas Criteria: A Review of Convention on Biological Diversity Regional Workshops and A Case Study of Coral Reef Conservation Planning

Consideration of Genetic Structure in the Ecologically or Biologically Significant Marine Areas Criteria: A Review of Convention on Biological Diversity Regional Workshops and A Case Study of Coral Reef Conservation Planning

Photographic evidence from a recreational angler of the northernmost record of the bull shark Carcharhinus leucas (Elasmobranchii: Carcharhinidae) in the western Pacific Ocean

Environmental DNA Characterization of the Fish Species Composition in the Mukawa River and Adjacent Habitats

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