Seagrass macroinvertebrate bycatches of the mosquito net trawl fishery in the Bay of Toliara, Madagascar (2018-2019): survey data and code (doi:10.23708/8XPDJE)

View:

Part 1: Document Description
Part 2: Study Description
Part 3: Data Files Description
Part 4: Variable Description
Part 5: Other Study-Related Materials
Entire Codebook

Seagrass macroinvertebrate bycatches of the mosquito net trawl fishery in the Bay of Toliara, Madagascar (2018-2019): survey data and code

doi:10.23708/8XPDJE

DataSuds

2023-05-31

1

Herinirina, Patricia; Léopold, Marc; Frouin, Patrick; Bigot, Lionel; Randriatsara, Roddy Michel, 2023, "Seagrass macroinvertebrate bycatches of the mosquito net trawl fishery in the Bay of Toliara, Madagascar (2018-2019): survey data and code", https://doi.org/10.23708/8XPDJE, DataSuds, V1, UNF:6:IHdA2gxWS5gA5D4vJ4HhSg== [fileUNF]

Seagrass macroinvertebrate bycatches of the mosquito net trawl fishery in the Bay of Toliara, Madagascar (2018-2019): survey data and code

doi:10.23708/8XPDJE

Herinirina, Patricia (Institut Halieutique et des Sciences Marines (IH.SM) - Université de Toliara - Madagascar)

Léopold, Marc (UMR ENTROPIE - IRD, Université de La Réunion, CNRS, Ifremer, UNC - France)

Frouin, Patrick (UMR ENTROPIE - IRD, Université de La Réunion, CNRS, Ifremer, UNC - France)

Bigot, Lionel (UMR ENTROPIE - IRD, Université de La Réunion, CNRS, Ifremer, UNC - France)

Randriatsara, Roddy Michel (Institut Halieutique et des Sciences Marines (IH.SM) - Université de Toliara - Madagascar)

Bigot, Lionel (UMR ENTROPIE - IRD, Université de La Réunion, CNRS, Ifremer, UNC – France)

Frouin, Patrick (UMR ENTROPIE - IRD, Université de La Réunion, CNRS, Ifremer, UNC – France)

Léopold, Marc (UMR ENTROPIE - IRD, Université de La Réunion, CNRS, Ifremer, UNC – France)

2019-01-01

Bourse "Jeune Equipe Associée à l'IRD" ACOM

DataSuds

Léopold, Marc

Léopold, Marc

2023-04-26

2023-06-01

https://doi.org/10.23708/8XPDJE

Earth and Environmental Sciences, species, abundance, biomass, GPS track, small-scale fishery, fishing data

Aquatic ecosystems

<p>The bay of Toliara (Madagascar) shelters diverse macroinvertebrate communities in seagrass beds.</p> <p>This study aims to improve the knowledge of the diversity, abundance, and socioeconomic role of the seagrass macrobenthos in that area. We studied the mosquito net trawl fishery in seagrass areas in the Bay through the GPS tracking of fishers in 2018-2019. Catches were monitored through monthly landing surveys to characterize spatial temporal patterns in the abundance and diversity of macroinvertebrates in the seagrass beds.</p> <p>Temporal effects (tide (spring/neap), months, and interaction terms) on the mean density and biomass of macroinvertebrate taxa were investigated through a generalized linear model (GLM) using the function « lm » (with a Poisson distribution) of the R software v.3.6.3.</p> <p>We provide here i) the survey data on seagrass macroinvertebrates collected in 2018-2019 in the Bay of Toliara, Madagascar using fishers' mosquito net trawls and ii) the R code used for statistical processing.</p>

2018-08-09-2019-03-03

2018-08-09-2019-03-03

Madagascar

Toliara, Atsimo-Andrefana

• West Bounding Longitude: 43.64124710026223
• East Bounding Longitude: 43.7834260042704
• South Bounding Latitude: -23.536291093876567
• North Bounding Latitude: -23.344147161473398

Kind of Data: Aggregate data

Herinirina, P., Bigot, L., Frouin, P., Volandrae, H., Randriatsara, R., Behivoke, F., Ranivoarivelo, L., Léopold, M. (2023). Seagrass macroinvertebrate bycatches support mosquito net trawl fishery in Madagascar. Aquatic Living Resources. 36.

10.1051/alr/2023014

Herinirina, P., Bigot, L., Frouin, P., Volandrae, H., Randriatsara, R., Behivoke, F., Ranivoarivelo, L., Léopold, M. (2023). Seagrass macroinvertebrate bycatches support mosquito net trawl fishery in Madagascar. Aquatic Living Resources. 36.

• Number of cases: 4905

• No. of variables per record: 26

• Type of File: text/tab-separated-values

UNF:6:T5GpajBd46hyTZVCX8Mmzw==

• Number of cases: 25

• No. of variables per record: 3

• Type of File: text/tab-separated-values

UNF:6:65uVVY8WBme9dTvzfYyt8Q==

• sheet_number - sheet_number
• date_echg - date_echg
• code_village - code_village
• code_engin - code_engin
• code_pecheur - code_pecheur
• Maree - Maree
• Site - Site
• Pecheur - Pecheur
• code_Ech - code_Ech
• Families - Families
• Species - Species
• ID_Photo - ID_Photo
• cap_tot_gross - cap_tot_gross
• Sample_weight (g) - Sample_weight (g)
• Abundance(n) - Abundance(n)
• Weight (g) - Weight (g)
• trawl_tow_per_trip_Dt(m) - trawl_tow_per_trip_Dt(m)
• Slope (q) - Slope (q)
• length_of_each_gear_Lt(m) - length_of_each_gear_Lt(m)
• Horizontal_opening_Lm (m) - Horizontal_opening_Lm (m)
• swept_area (m2) - swept_area (m2)
• swept_area(ha) - swept_area(ha)
• Density(ind/ha) - Density(ind/ha)
• Extrapolated_density (ind/ha) - Extrapolated_density (ind/ha)
• Biomass (g/ha) - Biomass (g/ha)
• Extrapolated_Biomass (kg/ha) - Extrapolated_Biomass (kg/ha)
• variable name - variable name
• variable description - variable description
• unit - unit

f38939 Location:

Summary Statistics: Min. 1.0; Valid 4905.0; StDev 34.58821164061919; Max. 120.0; Mean 63.73435270132533;

Variable Format: numeric

Notes: UNF:6:waQqyfCzJWWxiWLIuNo3rw==

f38939 Location:

Variable Format: character

Notes: UNF:6:ff5sHYekU7aEy4xK7SPIqA==

f38939 Location:

Variable Format: character

Notes: UNF:6:5/SDagKIDZ6+ut2HEponPQ==

f38939 Location:

Variable Format: character

Notes: UNF:6:79OqFICk62cwM341R7QxEA==

f38939 Location:

Variable Format: character

Notes: UNF:6:bn6G17VvW4GkVbNqJVWIsw==

f38939 Location:

Variable Format: character

Notes: UNF:6:LCR+FPFZQNbyExWe+61M3g==

f38939 Location:

Variable Format: character

Notes: UNF:6:Do8lLNhH3s4OsYW4xRrPCA==

f38939 Location:

Variable Format: character

Notes: UNF:6:EHE3Rw4FVpI7mHEfuILVjg==

f38939 Location:

Variable Format: character

Notes: UNF:6:tH26F7UORV61LC5D1DjnGA==

f38939 Location:

Variable Format: character

Notes: UNF:6:fzHA+zwfCaM0cCllUD8TLA==

f38939 Location:

Variable Format: character

Notes: UNF:6:22i07Hbcy/uVM3G6WweHxQ==

f38939 Location:

Variable Format: character

Notes: UNF:6:t5BS+vcp/euEnTyIcnpl7g==

f38939 Location:

Summary Statistics: Mean 25.54668705402653; StDev 10.77251908078924; Min. 2.0; Valid 4905.0; Max. 61.0

Variable Format: numeric

Notes: UNF:6:UpTATualsTJt08rWDjUrzg==

f38939 Location:

Summary Statistics: Max. 1000.0; Valid 4905.0; Min. 500.0; Mean 779.816513761466; StDev 248.24088889571885

Variable Format: numeric

Notes: UNF:6:UTDnqe34GdfIhm8a2SCcTg==

f38939 Location:

Summary Statistics: Valid 4905.0; Min. 0.0; Max. 224.0; StDev 15.71862123420333; Mean 3.116819571865492;

Variable Format: numeric

Notes: UNF:6:kVKX8Ii+O8YCsrJ/i7Qtlw==

f38939 Location:

Summary Statistics: Mean 15.145201990560283; StDev 68.00103247088022; Min. 0.0; Valid 4873.0; Max. 800.0

Variable Format: numeric

Notes: UNF:6:8LhU7LgUnW0+aIvgZWGBvw==

f38939 Location:

Summary Statistics: Mean 2108.5266055046054; Valid 4905.0; Max. 6871.0; Min. 0.0; StDev 1994.71923590603;

Variable Format: numeric

Notes: UNF:6:vCCYuRgwhbHc3PR4+ahBkQ==

f38939 Location:

Summary Statistics: Min. 0.0; Valid 4905.0; Mean 0.5318979612640163; StDev 0.08057023634841443; Max. 0.5441;

Variable Format: numeric

Notes: UNF:6:W43tZupShCKSoQ/qe/6q2g==

f38939 Location:

Summary Statistics: Max. 52.7; Mean 20.599622833842933; Min. 0.0; StDev 11.910938507015677; Valid 4905.0;

Variable Format: numeric

Notes: UNF:6:fC8mjITp41/WgSLjBjPKKQ==

f38939 Location:

Summary Statistics: Valid 4905.0; Mean 11.208254783894011; Min. 0.0; Max. 28.67407; StDev 6.4807416416673735

Variable Format: numeric

Notes: UNF:6:sI8ceH0cMOCzQ21Hg6IyDg==

f38939 Location:

Summary Statistics: Valid 4905.0; Max. 95989.52349; StDev 27521.630952827163; Min. 0.0; Mean 27651.609914656496;

Variable Format: numeric

Notes: UNF:6:TDWj+fnis5Ex6WkBYKWMxQ==

f38939 Location:

Summary Statistics: StDev 2.752163095282526; Min. 0.0; Valid 4905.0; Max. 9.598952349; Mean 2.765160991465654;

Variable Format: numeric

Notes: UNF:6:KfrW1P09AS08m9qMRpmSFQ==

f38939 Location:

Variable Format: character

Notes: UNF:6:xXCObHfsMxtFxVauB5ZTaA==

f38939 Location:

Variable Format: character

Notes: UNF:6:o98fVvUFjUYq2wkACUo8Tw==

f38939 Location:

Variable Format: character

Notes: UNF:6:SsANbjnYJjs8fW9vscm0SA==

f38939 Location:

Variable Format: character

Notes: UNF:6:Q8Why1u2wwrZeb7LR6M38g==

f38938 Location:

Variable Format: character

Notes: UNF:6:wBDwuR37TPyYY2dNOYH+Mg==

f38938 Location:

Variable Format: character

Notes: UNF:6:WmXGuofGFSU2f23qBf+fUg==

f38938 Location:

Variable Format: character

Notes: UNF:6:2GBXHpaALK+7EUHbJgwCTg==

Label:

1_ReadMe.txt

Text:

Dataset citation and description

text/plain

Label:

GLM_VF.R

Text:

R code of the GLM (General Linear Model) procedure used for processing the macroinvertebrate abundance data at the family taxonomic level

type/x-r-syntax

Label:

Rapport_final_Master_2_Patricia Herinirina.pdf

Text:

Herinirina, Patricia (2019) "Etude de la macrofaune benthique exploitée par la petite pêche dans les herbiers littoraux de la baie de Toliara (sud-ouest de Madagascar)", Master of Science thesis (in French, 56 pages).

application/pdf