scholarly journals Seasonal yield and composition of an inland artisanal fishery in a humic floodplain ecosystem of Central Kalimantan, Indonesia

2018 ◽  
Vol 19 (4) ◽  
pp. 1181-1185
Author(s):  
SULMIN GUMIR ◽  
ARDIANOR ARDIANOR ◽  
SYAHRINUDIN SYAHRINUDIN ◽  
GUSTI Z. ANSHARI ◽  
YUKIO KOMAI ◽  
...  
Keyword(s):  
Fish Species ◽  
Transition Period ◽  
Good Condition ◽  
Dry Season ◽  
Artisanal Fishery ◽  
Annual Fish ◽  
Peak Period ◽  
Fish Yield ◽  
Central Kalimantan ◽  
Channa Striata

Gumiri S, Ardianor, Syahrinudin, Anshari GZ, Komai Y, Taki K, Tachibana H. 2018. Seasonal yield and composition of aninland artisanal fishery in a humic floodplain ecosystem of Central Kalimantan, Indonesia. Biodiversitas 19: 1181-1185. Seasonal yieldof an inland artisanal fishery was studied in 2015 in the Takapan Floodplain Lake located along the Rungan River of Central KalimantanProvince-Indonesia. Record on daily fish catch consisting weight data and species composition was made in situ along with a one-yearrainfall data that was collected from the nearest Meteorological Station located in Palangka Raya City airport. Results showed thatthroughout the year, total annual yield of captured fishes reached 4.8 tons comprised of 34 commercial freshwater fish species. Seasonalyield varied considerably in which fish capture was higher during the rainy season than on the dry season. The transition period fromrainy to dry season was found to be the peak period of fish capture in the floodplain. Of the 34 fish species, the most abundant specieswas Channa striata that accounted to almost 50% of total annual fish yield. The two most abundant fishes, Channa striata, andKryptopterus palembangensis were a top predatory blackfish and an omnivorous surface water whitefish, respectively. This resultindicated that the studied floodplain habitat was still in good condition, however, conservation is needed to maintain the sustainability offreshwater fish resource in the future.

scholarly journals Effectiveness Analysis of Canal Blocking in Sub-peatland Hydrological Unit 5 and 6 Kahayan Sebangau, Central Kalimantan, Indonesia

2021 ◽  
Vol 53 (2) ◽  
pp. 210205
Author(s):  
Yadi Suryadi ◽  
Indratmo Soekarno ◽  
Ivan Aliyatul Humam
Keyword(s):  
Significant Influence ◽  
Satisfactory Result ◽  
Good Condition ◽  
Ground Level ◽  
Dry Season ◽  
Groundwater Table ◽  
Central Kalimantan ◽  
Effectiveness Analysis ◽  
Below Ground ◽  
Groundwater Rise

The height of canal blocking has a significant influence on re-wetting peatland, depending on the canal’s distance. An effective canal in good condition has to raise the groundwater table to -0.4 m below ground level according to the Indonesian Ministry of Environment and Forestry (MENLHK). The effectiveness of different canal blockings was modeled by Freewat software with variation of canal distance (200 m, 250 m, 300 m, 350 m, and 400 m) and blocking height (0.2 m, 0.3 m, 0.4 m, 0.5 m, 0.6 m). This simulation was carried out using recharge and evapotranspiration data covering 20 years. The input of the conductivity value was done using 50 m/day according to the calibration. From the modeling, 0.6 m high canal blockings give a satisfactory result at every canal distance. The study took place during the annual dry season, when recharge was almost zero and average evapotranspiration was 6 mm/day. Adjusting the canal blocking to a maximum of 0.6 m and the canal distance to 400 m, the groundwater table slowly rose 0.38 m and it took 30 days to reach full-re-wetting capacity. This study revealed that the effectiveness of canal blocking is directly related to evapotranspiration and recharge, which has a positive correlation with the groundwater rise and the re-wetting period.

scholarly journals Keragaman ikan di Danau Cala, Kabupaten Musi Banyuasin Sumatera Selatan

DEPIK ◽  
2014 ◽  
Vol 3 (3) ◽  
Author(s):  
Jifi Abu Ammar ◽  
Mohammad Mukhlis Kamal ◽  
Sulistiono .
Keyword(s):  
Fish Species ◽  
Fish Fauna ◽  
Dry Season ◽  
Transition Season ◽  
Fish Traps ◽  
The Family ◽  
Channa Striata

The aim of his studi was to evaluate the fish fauna in Danau Cala in dry season, transition season, and the tide season. The survey was conducted 3 times on July 2013, October 2013 and January 2014 as representative of dry, transition and tide seasons. The fish sampling was conducted by gillnets and fish traps. A total of 35 fish species were recorded during the study; 23 species in dry season, it was dominated by tembakang fish (Helostoma temminckii) from family Helosmatidae, Sepat siam fish(Trichogaster pectoralis) from Belontiidae family, and snakehead fish (Channa striata) of Channidae family. A total of 16 species were recorded on transitional seasons where baung fish (Hemibagrus nemurus) of the family Bagridae, and seluang fish (Rasbora sp) of the family Cyprinidae were predominant. In addition, 15 fish species were recorded on tide season which was dominated by baung fish (Hemibagrus nemurus) and tendon fish (Mystus sabanus) of family Bagridae

scholarly journals Seasonal feeding plasticity can facilitate coexistence of dominant omnivores in Neotropical streams

2021 ◽  
Author(s):  
Mayara P. Neves ◽  
Pavel Kratina ◽  
Rosilene L. Delariva ◽  
J. Iwan Jones ◽  
Clarice B. Fialho
Keyword(s):  
Seasonal Variation ◽  
Fish Species ◽  
Resource Availability ◽  
Seasonal Changes ◽  
Dry Season ◽  
Diet Overlap ◽  
Isotopic Niche ◽  
Neotropical Streams ◽  
Feeding Plasticity ◽  
The Impact

AbstractCoexistence of ecomorphologically similar species in diverse Neotropical ecosystems has been a focus of long-term debate among ecologists and evolutionary biologists. Such coexistence can be promoted by trophic plasticity and seasonal changes in omnivorous feeding. We combined stomach content and stable isotope analyses to determine how seasonal variation in resource availability influences the consumption and assimilation of resources by two syntopic fish species, Psalidodon aff. gymnodontus and P. bifasciatus, in the Lower Iguaçu basin. We also tested the impact of seasonality on trophic niche breadth and diet overlap of these two dominant omnivores. Seasonal changes in resource availability strongly influenced the consumption and assimilation of resources by the two fish species. Both species exhibited high levels of omnivory, characterized by high diversity of allochthonous resources in the wet season. Terrestrial invertebrates were the main component of diet during this season. However, in the dry season, both species reduced their isotopic niches, indicating diet specialization. High diet overlap was observed in both seasons, but the isotopic niche overlap was smaller in the dry season. Substantial reduction in the isotopic niche of P. bifascistus and a shift toward aquatic invertebrates can facilitate coexistence during this season of resource shortage. Feeding plasticity allows omnivorous fish to adjust their trophic niches according to seasonality, promoting the exploitation of different resources during periods of greater resource diversity. This seasonal variation could be an important mechanism that contributes to the resource partitioning and coexistence of dominant omnivores in Neotropical streams.

scholarly journals KOMPOSISI DAN FLUKTUASI HASIL TANGKAPAN TUGUK DI SUNGAI LEMPUING, SUMATERA SELATAN

2017 ◽  
Vol 15 (2) ◽  
pp. 105
Author(s):  
Dharmadi Dharmadi ◽  
Endi Setiadi Kartamihardja ◽  
Agus Djoko Utomo ◽  
Dian Oktaviani
Keyword(s):  
Fish Species ◽  
Descriptive Analysis ◽  
Dry Season ◽  
Survey Method ◽  
Wet Season ◽  
River Waters ◽  
Transition Season ◽  
Fish Catch ◽  
Catch Composition ◽  
Mystus Nemurus

Tujuan penelitian ini adalah untuk mengetahui komposisi dan fluktuasi hasil tangkapan tuguk pada periode berbeda yang dioperasikan di Sungai Lempuing, Sumatera Selatan. Kegiatan penelitian dilaksanakan dengan metode survei pada periode musim peralihan penghujan sampai dengan kemarau (bulan April), musim kemarau (bulan Juni) dan musim penghujan (bulan Desember) tahun 2007. Komposisi jenis ikan dan hasil tangkapan diperoleh berdasarkan pada data pengambilan contoh pada saat ke lapangan dan data harian hasil tangkapan tuguk yang dicatat oleh 3 orang enumerator. Data dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa hasil tangkapan tuguk berbeda menurut periode waktu. Hasil tangkapan terdiri atas 11 jenis ikan untuk musim peralihan dan kemarau masing-masing berkisar 400-450 kg per unit per hari (rata-rata 411,2+14,1 kg per unit per hari) dan 250-300 kg per unit per hari (rata-rata 263,3+13,4 kg per unit per hari) dan 13 jenis ikan pada musim penghujan (bulan Desember) berkisar 700-750 kg per unit per hari (rata-rata 724,8+17,7 kg per unit per hari). Hasil tangkapan didominansi oleh jenis ikan lele (Clarias melanoderma) dan baung (Mystus nemurus). Selama penelitian, kandungan oksigen terlarut di perairan relatif rendah, berkisar 2-4 mg per l, namun dapat ditolelir oleh kelompok jenis ikan rawa (black fish). This research proposed to observed a catch composition and fluctuation of filtering device in different periods operated in the Lempuing River, South Sumatera. The research was conducted using survey method at a respective month of April (transition season), June (dry season) and December 07 (wet season). Fish composition and catch of tuguk were noted during survey and based on recording 3 enumerators. Descriptive analysis was used in this study. The results show that the catch of filtering device differed on diferent season periodes. A number of 11 fish species was caught at a respective season of transition season (April) of 400-450 kg per unit per day (average=411.2+14,1 kg per unit per day), dry season (June) of 250 300 kg per unit per day (average = 263,3+13,4 kg per unit per day), whilst at rainy season (December), fish catch composed of 13 fish species, ranging 700-750 kg per unit per day or (average = 724.8+17.7 kg per unit per day). Clarias melanoderma and Mystus nemurus were dominantly caught in the Lempuing River waters. During observation, dissolved oxygen content was relatively low (2-4 mg per l), that but could be tolerated by black fish.

scholarly journals Effect of introduced species and habitat alteration on the occurrence and distribution of euryhaline fishes in fresh- and brackish-water habitats on Aruba, Bonaire and Curaçao (South Caribbean)

2008 ◽  
Vol 77 (1) ◽  
pp. 45-51 ◽  
Author(s):  
H. Hulsman ◽  
R. Vonk ◽  
M. Aliabadian ◽  
A.O. Debrot ◽  
V. Nijman
Keyword(s):  
Fish Species ◽  
Poecilia Reticulata ◽  
Fish Fauna ◽  
Hierarchical Cluster ◽  
First Record ◽  
Dry Season ◽  
Indigenous Species ◽  
Wet Season ◽  
Netherlands Antilles ◽  
Induced Changes

We conducted an ichthyological survey during the dry season of 2006 on the semi-arid islands of Aruba, Bonaire and Curaçao to provide information on species composition, richness and distribution in natural and non-natural aquatic habitats. The dry season species assemblages (N = 9 species) comprised less species than the wet seasons, and these data refine our knowledge of the indigenous fish fauna and its refuge localities during phases of drought and ensuing high salinity. A hierarchical cluster analysis reveals that the three islands have different species compositions with Curaçao being the most diverse, probably due to its having the most habitats and freshwaters present throughout the year. Species richness was unrelated to salinity and species diversity was highest in canalised streams. In the dry season fewer amphidromous species are present than in the wet season. We found no significant effect of human-induced changes on the presence or absence of fish species in the Netherlands Antilles. The presence of exotic species (including Xiphophorus helleri on Aruba, a first record for this island, and Oreochromis mossambicus and Poecilia reticulata occurring on all three islands) did not have a clear effect on the presence of indigenous species, nor did human alteration of the habitats have an influence on the occurrence of fish species.

Prediction of conception rate in extensive beef herds in north-western Australia. 1. Seasonal mating and improved management

1991 ◽  
Vol 31 (1) ◽  
pp. 1 ◽  
Author(s):  
PK O'Rourke ◽  
VJ Doogan ◽  
TH McCosker ◽  
AR Eggington
Keyword(s):  
Low Cost ◽  
Good Condition ◽  
Dry Season ◽  
Conception Rate ◽  
Gravid Uterus ◽  
Practical Implementation ◽  
Lactating Cows ◽  
Conception Rates ◽  
Return On Capital ◽  
Condition Score

Statistical models for conception rate were developed using data collected at a mid dry season (August-September) muster from a controlled-mated and supplemented herd of 900 Brahman cross cows at Mt Bundey from 1980-84. Average conception rates were 74% for maidens, 25% for first-lactation cows, 51 % for 4-10-year-old lactating cows, 54% for >10-year-old lactating cows and 96% for non-lactating cows. Although year effects dominated, they were partially explained by severity of the dry season and were consistent across levels of the other factors. Pregnant maiden heifers weighed 13 kg more than non-pregnant ones at the end of mating, after allowing for the weight of the fetus and gravid uterus. Conception rate of first-lactation cows was not affected by month of calving, adjusted mid dry season weight or condition score, possibly because of narrow ranges in these factors based on selection. For mature lactating cows the main effects on conception rate were month of calving (+11% for September to -16% for December or later), previous lactation (+6% for having reared a calf), adjusted mid dry season weight (-16% for <300 kg to +9% for >350 kg) and condition score (-17% for backward and store to +16% for good condition). Corresponding effects for aged lactating cows were +14% for September to -19% for December or later calving, +8% for previously rearing a calf, and -24% for backward store and store to +23% for good condition cows. The high conception rates for non-lactating cows corresponded with high liveweights and condition scores. A low cost, practical implementation of these models is based on previous lactation status and condition score in the mid dry season, with pregnancy diagnosis added at the next stage. Reproductive classes could be segregated on this basis for improved management and nutrition and to gain an economic return on capital invested in cattle control.

Length-weight relationships for 13 fish species from a coastal artisanal fishery at Cape Verde peninsula (Senegal)

2015 ◽  
Vol 31 (6) ◽  
pp. 1177-1179
Author(s):  
M. Pan ◽  
R. Ouréns ◽  
L. Dione ◽  
I. Samba ◽  
N. Sánchez-Carnero ◽  
...  
Keyword(s):  
Fish Species ◽  
Cape Verde ◽  
Artisanal Fishery

Phenology of three coexisting annual fish species: seasonal patterns in hatching dates

Hydrobiologia ◽  
2017 ◽  
Vol 809 (1) ◽  
pp. 323-337 ◽  
Author(s):  
Daniel García ◽  
Marcelo Loureiro ◽  
Emanuel Machín ◽  
Martin Reichard
Keyword(s):  
Fish Species ◽  
Seasonal Patterns ◽  
Annual Fish

scholarly journals POTENSI IKAN HIAS DI DANAU BATU KABUPATEN PULANG PISAU SUATU PENDEKATAN BIOLOGI DAN ETNOBIOLOGI

2019 ◽  
Vol 44 (1) ◽  
pp. 58
Author(s):  
Elyta Vivi Yanti ◽  
Nicko Haryadi
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Economic Value ◽  
Secondary Data ◽  
High Water ◽  
Ornamental Fish ◽  
Capital City ◽  
Primary Data ◽  
Ecological Value ◽  
Central Kalimantan

General waters of Central Kalimantan with an area of around 2.29 million Ha is a habitat for freshwater fish, both of which have important economic value and ecological value. Diversity of fish species is a potential for fisheries production both as consumption fish, fish traded between regions and ornamental fish. Based on the latest data, there are 267 species of fish in the public waters of Central Kalimantan and 92 species of which are included in the category of ornamental fish species (Central Kalimantan Marine and Fisheries Service, 2010). Batu Lake is located in Sigi Village, Kahayan Tengah District, Pulang Pisau Regency, Central Kalimantan Province. The area of the lake is approximately 12 km2, around the lake there are rafts and settlements, the distance from the capital city of Kahayan Tengah Subdistrict (bukit rawi + 3 km where the lake slightly enters, through a small road. The distance to the lake is about 250 m from the road) province, the condition of the lake is still natural and only used by residents of Tuwung as a place to find livelihoods (looking for fish and other river products) as well as a means of transportation to certain areas in foodplain waters such as the Lake Batu high water fluctuations (volume of water) in a year is very large. Ruaya fish means adjustment, confidence in conditions that benefit existence and for the reproduction of species with active and sometimes passive movements from one place to another. Effendi (1997) groups the family in the interests of spawning, ruaya to enlargement and food areas and refugee homes to avoid da ri place that is in a bad condition. This research is an effort to introduce the potential of freshwater natural resources in the Lake Batu District of Pulang Pisau in the form of ornamental fish. The inventory activity will provide information about potential types of ornamental fish with all the values of their superiority or attraction so that they can become superior commodities. This research was carried out in Batu Lake (2º 08'23.26 "S 113º 57.11'11.97" E) in Sigi Village, Kahayan Tengah District, Pulang Pisau Regency, Central Kalimantan Province. Collection is done by exploring primary and secondary data about the characteristics of biology, water quality. Water quality measurements are carried out directly in the location to obtain primary data, while secondary data is carried out through interviews with the community. The data obtained is then analyzed and explained in qualitative and quantitative descriptive so that it can provide representative information for the development of ornamental fish. The type of ornamental fish caught in the Leerii Trichogaster, Bicirrhis Cryptopterus, Rasbora Argyrotaenia, Parachela Hypophthalmus, Rasbora Caudimaculate

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