<italic>Nesting and conservation of the Olive Ridley sea turtle (Lepidochelys olivacea) in playa Drake, Osa Peninsula, Costa Rica (2006-2012)</italic>

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doi:10.15517/rbt.v63i1.23099

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Artículo • Rev. biol. trop 63 (Suppl 1) • Apr 2015 • https://doi.org/10.15517/rbt.v63i1.23099 linkcopy

Nesting and conservation of the Olive Ridley sea turtle (Lepidochelys olivacea) in playa Drake, Osa Peninsula, Costa Rica (2006-2012)

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The nesting of the Olive Ridley (Lepidochelys olivacea) sea turtle was studied from 2006 to 2012 in Drake Bay, Costa Rica, an important solitary nesting site and center of eco-tourism in the Osa Peninsula. During this period, 958 nests were recorded (mean: 136.9 nests per season; density: 3.8 nests/100m of beach per season), of which 38% were relocated to a hatchery. The incidence of poaching was reduced from 85% in 2005 to a mean of 10.1% from 2006-2012. A total of 335 nesting females were tagged; the mean curved length of carapace was 66.1cm, the mean curved width was 70.2cm, and the mean number of eggs per nest was 96.3. A mean rate of reproductive success of 79.2% was obtained and over 61 000 hatchlings were liberated from the hatchery. This project is an example of a successful community-based conservation and eco-tourism initiative. Rev. Biol. Trop. 63 (Suppl. 1): 117-129. Epub 2015 April 01.

Key words: Olive Ridley; Cheloniidae; nesting biology; sea turtle; poaching; community-based conservation

-	Valor mínimo	Valor máximo	Media	D.E.	n
Temporada 2006 LCC (cm)	58.5	71.1	65.7	3.22	26
ACC (cm)	66.5	76.0	70.3	2.60	26
N^o de huevos	54	136	100	18.1	65
Temporada 2007 LCC (cm)	60.5	72.5	67.0	3.00	32
ACC (cm)	66.5	78.6	71.1	3.20	31
N^o de huevos	7	133	94.1	27.0	53
Prof. de nido (cm)	34.5	57.0	42.1	5.20	39
Temporada 2008 LCC (cm)	59.5	72.5	66.2	2.83	51
ACC (cm)	64.0	77.5	70.1	2.78	51
N^o de huevos	24	156	95.7	19.8	104
Prof. de nido (cm)	30.0	51.0	40.2	4.27	25
Temporada 2009 LCC (cm)	61.0	67.5	67.5	2.01	34
ACC (cm)	65.0	76.0	71.1	3.04	34
N^o de huevos	32	128	98.5	19.5	60
Prof. de nido (cm)	22.0	54.0	41.6	5.96	52
Temporada 2010 LCC (cm)	60.0	77.0	66.1	3.11	83
ACC (cm)	62.0	78.0	69.8	3.21	82
N^o de huevos	29	135	95.9	21.3	128
Prof. de nido (cm)	32.0	66.0	43.9	4.31	113
Temporada 2011 LCC (cm)	58.0	72.0	66.0	2.67	84
ACC (cm)	64.5	76.0	70.0	2.64	84
N^o de huevos	40	138	96.3	19.9	115
Prof. de nido (cm)	33.0	50.0	42.2	3.94	104
Temporada 2012 LCC (cm)	61.0	78.0	65.4	3.00	72
ACC (cm)	63.0	75.0	69.5	2.68	72
N^o de huevos	12	136	96.4	21.7	119
Prof. de nido (cm)	29.0	54.0	42.7	4.39	118

Media eclosión %			Media emergencia %
Temporada 2006	-	-	-
Playa	81.8	75.8	n.i.
Vivero Temporada 2007	89.2	85.2	44
Playa	75.4	68.1	n.i.
Vivero Temporada 2008	85.8	83.1	33
Playa	76.7	73.0	48
Vivero Temporada 2009	62.6	61.4	48
Playa	81.6	77.3	24
Vivero Temporada 2010	75.2	73.3	40
Playa	76.2	73.9	11
Vivero Temporada 2011	80.4	78.4	92
Playa	71.2	54.8	6
Vivero Temporada 2012	74.2	70.0	106
Playa	86.4	71.1	7
Vivero	86.9	84.8	110

-	Valor mínimo	Valor máximo	Media	D.E.	n*
Temporada 2006 Peso H (g)	23.0	40.0	32.3	3.05	n.i.
LCC (cm)	3.80	5.00	4.30	0.20	n.i.
ACC (cm)	4.00	5.00	4.70	1.85	n.i.
Peso C (g)	11.0	23.0	18.3	2.73	n.i.
Temporada 2007 Diámetro (cm)	3.40	4.70	3.70	0.10	n.i.
Peso H (g)	23.0	39.0	32.4	2.80	n.i.
LCC (cm)	3.50	4.80	4.30	0.10	n.i.
ACC (cm)	4.00	5.30	4.50	1.10	n.i.
Peso C (g)	13.0	22.0	17.7	1.80	n.i.
Temporada 2008 Diámetro (cm)	3.20	4.00	3.68	0.10	47
Peso H (g)	26.0	41.0	32.7	1.46	47
LCC (cm)	3.90	4.80	4.30	0.14	48
ACC (cm)	3.90	5.00	4.48	0.14	48
Peso C (g)	13.0	21.0	17.2	1.21	48
Temporada 2009 Diámetro (cm)	3.40	3.9	3.68	0.15	40
Peso H (g)	22.8	42.2	31.0	1.29	40
LCC (cm)	3.81	5.45	4.44	0.15	39
ACC (cm)	3.81	5.45	4.49	0.14	39
Peso C (g)	14.1	20.8	17.3	0.83	39
Temporada 2010 Diámetro (cm)	3.15	3.99	3.58	0.11	91
Peso H (g)	24.0	39.2	33.1	1.36	91
LCC (cm)	4.13	4.89	4.47	0.17	49
ACC (cm)	4.18	4.99	4.52	0.19	49
Peso C (g)	14.1	21.7	17.6	1.73	55
Temporada 2011 Diámetro (cm)	3.10	3.95	3.59	0.16	101
Peso H (g)	23.6	38.7	32.5	4.34	101
LCC (cm)	3.38	5.41	4.43	0.31	101
ACC (cm)	4.10	5.66	4.58	0.25	101
Peso C (g)	13.2	29.0	18.6	2.78	101
Temporada 2012 Diámetro (cm)	3.22	3.87	3.55	0.14	109
Peso H (g)	16.6	38.4	31.4	3.90	109
LCC (cm)	4.02	4.98	4.44	0.18	99
ACC (cm)	4.02	4.95	4.53	0.18	99
Peso C (g)	12.6	21.2	17.1	1.79	99

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Universidad de Costa Rica Universidad de Costa Rica. Escuela de Biología, 2060 San José, Costa Rica, San Pedro, San José, CR, 2060, 2511-5500 , 2511-5550 - E-mail: rbt@biologia.ucr.ac.cr

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