Parasite community analysis of the gray snapper Lutjanus griseus (Perciformes,Lutjanidae) in a tropical region of the Southern Gulf of Mexico

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Characterization of the Lutjanus griseus parasite structure in the Mecoacán Lagoon system for the rainy and dry season_

	Dry season	Wet season
Examined hosts	n=30	n=30
Average number of species ± SD	2.7 ± 1.23	3.16 ± 0.74
Average number of parasites ± SD	18.33 ± 16.53	42.7 ± 23.47
Range	2 – 61	13 – 139
Average Simpson’s Index (1/D) ± SD	0.47 ± 0.21	0.54 ± 0.065
Range	0 – 0.84	0.41 – 69
Average Brillouin’s Index ± SD	0.53 ± 0.27	0.74 ± 0.142
Range	0 – 1.14	0.57 – 1.21

Characterization of the diversity of the component community of the Lutjanus griseus parasites in the Mecoacan Lagoon system for the dry and rainy season_

	Dry season	Wet season
Examined hosts	30	30
N° of species	14	11
N° of individuals	550	1281
Shannon Index	1.03	1.18
Margalef’s Index	2.06	1.39
Berger-Parker Index	0.56	0.45
Numerical dominance 1/D	0.45	0.34
Dominant species	Euryhaliotrema griseus	Euryhaliotrema fastigatum

Parasite species found in Lutjanus griseus (n = 60)_ Parasites Species, Organ preference, Location in the body of the host: GC- gill cavity, IC- intestinal cecum, Me- mesentery, CC- coelomic cavity, Stw- stomach wall, S-stomach, I- intestine, L- liver_ Levels of infection in prevalence (%P), mean abundance (MA) (± standard deviation), intensity (M) in dry and rain seasons_

		Dry season			Wet season
	Site of Infection	I	%P	MA	I	%P	MA
Myxozoo sp.	I, R	0	0	0	17	33.33	5.7 ± 3.4
Euryhaliotrema griseus	S, GC, D, R	10.65	96.66	10.3 ± 2.1	15.46	100	15.46 ± 1.2
Euryhaliotrema fastigatum	S, CG, R	7.21	93.33	6.73 ± 1.6	19.63	100	19.63 ± 1.9
Helicometra sp.	I, D	1.16	20	0.23 ± 0.09	1	3.33	0.033 ± 0.33
Siphodera vinaledwardsii	IC, D, R	1	3.33	0.03 ± 0.03	0	0	0
Pseudophyllidea gen. sp.	IC, D	3	3.33	0.1 ± 0.07	0	0	0
Tetraphyllidea gen. sp.	IC, D	10	3.33	0.33 ± 0.33	0	0	0
Contracaecum sp. type 1*	I, Me, CC, D, R	1	3.33	0.03 ± 0.18	0.2	16.66	0.03 ± 0.18
Contracaecum sp. type 2*	I, Me, CC D, R	3	3.33	0.1 ± 0.1	3	23.33	0.7 ± 0.3
Cucullanus pargi .*	I, Me, CC D, R	1.5	6.66	0.1 ± 0.74	1	3.33	0.03 ± 0.18
Pseudoterranova sp.*	Me, R	0	0	0	1	3.33	0.03 ± 0.18
Rhadinorhynchus sp.	M, D	1	3.33	0.03 ± 0.03	0	0	0
Gorgorhynchoides sp.	Me, S, D	1	3.33	0.03 ± 0.18	1	3.33	0.1 ± 0.5
Cysthacanth sp.1	I, Me, CC D, R	1	3.33	0.03 ± 0.03	0	0	0
Cysthacanth sp. 2	I, Me, CC D, R	1	3.33	0.03 ± 0.033	0	0	0
Gorgorhynchus sp.	Ly Me, Stw, R	1.16	20	0.23 ± 0.093	1	6.66	0.01 ± 0.25
Neoechinorhynchus sp.	Ly Me, Stw	0	0	0	4.28	23.33	1 ± 2.6