Utilizing Gliders and Acoustics to Identify Fish Habitat Hotspots. A Case Study

2018 ◽  
Author(s):  
Chad Lembke ◽  
Alex Silverman ◽  
David Mann ◽  
John Gray ◽  
Chris Taylor ◽  
...  
Keyword(s):  
Fish Habitat

Fish Habitat: Essential Fish Habitat and Rehabilitation

1999 ◽  
Keyword(s):  
Lake Erie ◽  
Habitat Management ◽  
Fish Habitat ◽  
Learning By Doing ◽  
Suitable Habitat ◽  
Physical Habitat ◽  
Fish Stocks ◽  
Habitat Features ◽  
Fish Habitats

<em>Abstract.—</em> The quality and quantity of habitats determine ecosystem productivity. Hence, they determine the potential fish productivity that sustains the fish harvests extractable from freshwaters and seas. Efforts to conserve and protect fish habitats are frustrated by key unanswered questions: which habitat types and how much must be protected to ensure natural self-sustaining fish stocks? Minns and Bakelaar presented a prototype method for assessing suitable habitat supply for fish stocks in Lake Erie, an analysis that can be used to address conservation issues. Here, the method is refined and extended, taking the assessment of habitat supply for pike <em>Esox lucius </em> in the Long Point region of Lake Erie as a case study. As with the previous study, much emphasis is placed on “learning by doing.” Because available inventories of habitat features are coarse and incomplete, improved guidelines for estimating habitat supply are expected from these prototype studies. The habitat supply method previously presented by Minns and Bakelaar is elaborated in three ways here: (1) the basic physical habitat assessment is derived from a remote-sensing inventory database; (2) methods of quantifying the thermal regime and integrating it with other habitat elements are examined; (3) habitat supply estimates are used in a pike population model, and pike biomass and production are simulated for the Long Point region of Lake Erie and then compared with available records. The roles of error and uncertainty are examined for all elements in the estimation and application of suitable habitat supply values. There is potential for supply measurement and analysis to guide fish habitat management.

Flow reduction effect on fish habitat below water diversion—A case study of the Central Yunnan Water Diversion Project

2022 ◽  
Vol 175 ◽  
pp. 106499
Author(s):  
Chenguang Xiang ◽  
Wei Huang ◽  
Huaidong Zhou ◽  
Lianqing Xue ◽  
Zhuowei Wang ◽  
...  
Keyword(s):  
Fish Habitat ◽  
Water Diversion ◽  
Flow Reduction ◽  
Water Diversion Project ◽  
Reduction Effect

scholarly journals Fish species, traders, and trade in traditional market: Case study in Pasar Baru, Balikpapan City, East Kalimantan, Indonesia

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
RAHMAN LATIF ALFIAN ◽  
JOHAN ISKANDAR ◽  
BUDIAWATI SUPANGKAT ISKANDAR ◽  
SUROSO ◽  
DICKY P. ERMANDARA ◽  
...  
Keyword(s):  
Fish Species ◽  
Fish Habitat ◽  
Ecological Knowledge ◽  
Transmission Of Knowledge ◽  
East Kalimantan ◽  
Depth Interview ◽  
Traditional Market ◽  
High Diversity ◽  
Conservation Of Biodiversity

Abstract. Alfian RL, Iskandar J, Iskandar BS, Suroso, Ermandara DP, Mulyanto D, Partasasmita R. 2020. Fish species, traders, and trade in traditional market: Case study in Pasar Baru, Balikpapan City, East Kalimantan, Indonesia. Biodiversitas 21: 393-406. The purpose of this study is to analyze the species of fish traded by fish traders in the Pasar Baru traditional market, Balikpapan, East Kalimantan. In addition, this study analyses the Traditional Ecological Knowledge (TEK) of fish traders on fishes, including naming fish, fish habitat and caught technique, sex differentiate, taste of fish, price of fish, origin of fish and processing, freshness of fish and preservation, and the transmission of knowledge and conservation of the fish species. This study used qualitative methods that ethnoichthyology approach was used, with some field technics, namely observation, depth interview, and survey of species of fish were applied. The results showed that there were 36 species, representing 22 families recorded in the traditional market of Pasar Baru. Fish traders have good knowledge on fishes, including naming fish, sex differentiate, fish caught, freshness of fish, and how to preserve fish. Traders often offer fish to buyers by mentioning the names and various aspects of fish species, so the traders have indirectly introduced and socialized the TEK of fish species to buyers and a wider community. In addition, since the high diversity of fish species has normally traded in the traditional market, it has an important function not only for the community's economy, but also have an important function for the conservation of biodiversity of fish species in the region.

Compensation ratios needed to offset timing effects of losses and gains and achieve no net loss of productive capacity of fish habitat

2006 ◽  
Vol 63 (5) ◽  
pp. 1172-1182 ◽  
Author(s):  
Charles K Minns
Keyword(s):  
Fish Habitat ◽  
Time Frame ◽  
Development Project ◽  
Productive Capacity ◽  
Habitat Alterations ◽  
No Net Loss ◽  
Future Discounting ◽  
Timing Effects ◽  
Fish Habitats

Minns' (Can. J. Fish. Aquat. Sci. 54: 2463–2473 (1997)) framework for assessing net change of productive capacity of fish habitats in Canada is expanded to include the effect of timing of losses and gains on cumulative net change. The expansion requires establishment of a reference time frame for assessment. A time frame of twice the project's duration is recommended. Delaying compensation actions while incurring losses early in a project increases the levels of compensation required. The addition of future discounting had much less effect on compensation requirements than the effects resulting from timing differences between losses and compensation. As discounts apply equally to losses and gains, they likely balance out over time. Delays between when habitat alterations occur and when expected productive capacity is attained increase the required compensation. There are advantages to starting compensation efforts early in a development project. A case study of a hypothetical northern diamond mine shows how various components of compensation (replacement, uncertainty, and timing) can be integrated when assessing net change. Consideration of all components of compensation indicates the need for tougher precautionary compensation guidelines with ratios greater than the current 1:1. Values of 2:1 or higher may be necessary to ensure attainment of Canada's guiding policy principle of no net loss.

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